TCTM Kids IT Education (TCTM) 20-F 20 Apr 16 2015 FY Annual report (foreign) Financial data

Document and Entity Information

Document and Entity Information	12 Months Ended
	Dec. 31, 2015shares
Document and Entity Information [Abstract]
Document Type	20-F
Document Period End Date	Dec. 31, 2015
Amendment Flag	false
Entity Registrant Name	Tarena International, Inc.
Entity Central Index Key	1,592,560
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding	54,563,321
Class A Ordinary Shares [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding	43,988,425
Class B Ordinary Shares [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding	10,574,896

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 79,145,296	$ 42,659,791
Time deposits	69,280,200	$ 106,834,876
Restricted time deposits	23,099,668
Accounts receivable, net of allowance for doubtful accounts	22,637,451	$ 23,184,239
Prepaid expenses and other current assets	10,179,811	8,730,124
Total current assets	204,342,426	181,409,030
Time deposits	17,590,693	17,313,054
Accounts receivable, net of allowance for doubtful accounts	1,196,747	1,488,251
Property and equipment, net	19,690,779	$ 13,373,950
Cost method investments	3,695,946
Other non-current assets	8,178,969	$ 4,369,889
Total assets	254,695,560	217,954,174
Current liabilities:
Accounts payable	679,549	$ 319,138
Amounts due to a related party	135,393
Income taxes payable	8,669,015	$ 5,394,036
Deferred revenue	25,336,265	19,276,602
Accrued expenses and other current liabilities	12,294,473	8,439,410
Total current liabilities	47,114,695	33,429,186
Other non-current liabilities	1,437,238	1,637,756
Total liabilities	$ 48,551,933	$ 35,066,942
Commitments and contingencies
Shareholders' equity:
Treasury shares (nil and 926,113 Class A ordinary shares as of December 31, 2014 and 2015, respectively, at cost)	$ (7,738,834)
Additional paid-in capital	144,776,619	$ 135,886,427
Accumulated other comprehensive income (loss)	(4,905,419)	1,701,598
Retained earnings	73,955,772	45,246,762
Total shareholders' equity	206,143,627	182,887,232
Total liabilities and shareholders' equity	254,695,560	217,954,174
Class A [Member]
Shareholders' equity:
Ordinary shares	44,914	23,712
Class B [Member]
Shareholders' equity:
Ordinary shares	$ 10,575	$ 28,733

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Apr. 30, 2014	Apr. 03, 2014	Feb. 27, 2014	Dec. 16, 2008	Dec. 15, 2008	Oct. 08, 2003
Current assets:
Accounts receivable, net of allowance for doubtful accounts	$ 22,637,451	$ 23,184,239
Prepaid expenses and other current assets	10,179,811	8,730,124
Accounts receivable, net of allowance for doubtful accounts	1,196,747	1,488,251
Property and equipment, net	19,690,779	$ 13,373,950
Cost method investments	3,695,946
Other non-current assets	8,178,969	$ 4,369,889
Current liabilities:
Accounts payable	679,549	319,138
Income taxes payable	8,669,015	5,394,036
Accrued expenses and other current liabilities	12,294,473	8,439,410
Other non-current liabilities	$ 1,437,238	$ 1,637,756
Ordinary shares
Ordinary shares, par value					$ 0.001			$ 0.001
Authorized					1,000,000,000	90,000,000	9,000,000	90,000,000
Issued						13,580,000	1,358,000
Outstanding				50,657,389		13,580,000	1,358,000
Common Class A [Member]
Ordinary shares
Ordinary shares, par value	$ 0.001	$ 0.001	$ 0.001
Authorized	860,000,000	860,000,000			860,000,000
Issued	44,914,538	23,712,758
Outstanding	43,988,425	23,712,758		16,800,000
Treasury shares	926,113
Common Class B [Member]
Ordinary shares
Ordinary shares, par value	$ 0.001	$ 0.001
Authorized	40,000,000	40,000,000			40,000,000
Issued	10,574,896	28,733,024
Outstanding	10,574,896	28,733,024		33,857,389
VIE [Member]
Current assets:
Cash	$ 160,614	$ 243,292
Prepaid expenses and other current assets	153	25,166
Property and equipment, net	2,709	$ 19,582
Cost method investments	2,771,960
Other non-current assets	40,917
Current liabilities:
Income taxes payable	575,480	$ 616,515
Accrued expenses and other current liabilities	137,408	103,231
Other non-current liabilities	$ 41,145	$ 43,664

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net revenues	$ 189,189,530	$ 136,204,017	$ 92,833,660
Cost of revenues	(53,569,964)	(39,079,756)	(29,068,058)
Gross profit	135,619,566	97,124,261	63,765,602
Selling and marketing expenses	(61,824,142)	(42,562,280)	(30,251,656)
General and administrative expenses	(40,358,751)	(29,947,822)	(16,223,871)
Research and development expenses	(8,112,739)	(5,445,668)	(3,807,155)
Operating income (loss)	25,323,934	19,168,491	13,482,920
Interest income	6,862,762	4,360,315	$ 1,541,175
Foreign currency exchange gains (losses)	(4,737,644)	1,196,530
Other income	1,897,019	2,370,736	$ 1,294,262
Income before income taxes	29,346,071	27,096,072	16,318,357
Income tax expense	(637,061)	(2,404,824)	(2,271,326)
Net income	$ 28,709,010	24,691,248	14,047,031
Accretion of convertible redeemable preferred shares		(576,431)	(44,360,060)
Net income (loss) attributable to Class A and Class B ordinary shareholders	$ 28,709,010	$ 24,114,817	$ (30,313,029)
Basic earnings (loss) per Class A and Class B ordinary share	$ 0.53	$ 0.51	$ (2.77)
Diluted earnings (loss) per Class A and Class B ordinary share	$ 0.49	$ 0.44	$ (2.77)
Net income	$ 28,709,010	$ 24,691,248	$ 14,047,031
Other comprehensive income (loss)
Foreign currency translation adjustment, net of nil income taxes	(6,607,017)	66,678	1,150,824
Comprehensive income	$ 22,101,993	$ 24,757,926	$ 15,197,855

CONSOLIDATED STATEMENTS OF COM5

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Foreign currency translation adjustment, taxes
Share-based compensation expense	$ (5,286,891)	$ (4,062,159)	$ (764,746)
Cost of revenues [Member]
Share-based compensation expense	(106,707)	(56,743)	(17,179)
Selling and marketing expenses [Member]
Share-based compensation expense	(314,575)	(168,601)	(45,233)
General and administrative expenses [Member]
Share-based compensation expense	(4,540,855)	(3,627,078)	(654,323)
Research and development expenses [Member]
Share-based compensation expense	$ (324,754)	$ (209,737)	$ (48,011)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (DEFICIT) - USD ($)	Total	Series A Convertible Redeemable Preferred Shares [Member]	Series B Convertible Redeemable Preferred Shares [Member]	Series C Convertible Redeemable Preferred Shares [Member]	Class A [Member]	Class B [Member]	Ordinary Shares [Member]Class A [Member]	Ordinary Shares [Member]Class A [Member]Series A Convertible Redeemable Preferred Shares [Member]	Ordinary Shares [Member]Class A [Member]Series B Convertible Redeemable Preferred Shares [Member]	Ordinary Shares [Member]Class A [Member]Series C Convertible Redeemable Preferred Shares [Member]	Ordinary Shares [Member]Class B [Member]	Ordinary Shares [Member]Class B [Member]Series A Convertible Redeemable Preferred Shares [Member]	Ordinary Shares [Member]Class B [Member]Series B Convertible Redeemable Preferred Shares [Member]	Ordinary Shares [Member]Class B [Member]Series C Convertible Redeemable Preferred Shares [Member]	Treasury Shares [Member]	Treasury Shares [Member]Series A Convertible Redeemable Preferred Shares [Member]	Treasury Shares [Member]Series B Convertible Redeemable Preferred Shares [Member]	Treasury Shares [Member]Series C Convertible Redeemable Preferred Shares [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]Series A Convertible Redeemable Preferred Shares [Member]	Additional Paid-in Capital [Member]Series B Convertible Redeemable Preferred Shares [Member]	Additional Paid-in Capital [Member]Series C Convertible Redeemable Preferred Shares [Member]	Accumulated Other Comprehensive Income (loss) [Member]	Accumulated Other Comprehensive Income (loss) [Member]Series A Convertible Redeemable Preferred Shares [Member]	Accumulated Other Comprehensive Income (loss) [Member]Series B Convertible Redeemable Preferred Shares [Member]	Accumulated Other Comprehensive Income (loss) [Member]Series C Convertible Redeemable Preferred Shares [Member]	Retained Earnings (Accumulated Deficit) [Member]	Retained Earnings (Accumulated Deficit) [Member]Series A Convertible Redeemable Preferred Shares [Member]	Retained Earnings (Accumulated Deficit) [Member]Series B Convertible Redeemable Preferred Shares [Member]	Retained Earnings (Accumulated Deficit) [Member]Series C Convertible Redeemable Preferred Shares [Member]
Balance at Dec. 31, 2012	$ (34,966,849)										$ 10,851												$ 484,096				$ (35,461,796)
Balance, shares at Dec. 31, 2012											10,851,287
Net income	14,047,031																										$ 14,047,031
Foreign currency translation adjustment, net of nil income taxes	1,150,824																						$ 1,150,824
Share-based compensation	764,746																		$ 764,746
Accretion of convertible redeemable preferred shares	(44,360,060)																		$ (843,595)								$ (43,516,465)
Conversion of convertible redeemable preferred shares to ordinary shares		$ 80,224										$ 1,375								$ 78,849
Conversion of convertible redeemable preferred shares to ordinary shares, shares												1,375,271
Balance at Dec. 31, 2013	(63,284,084)										$ 12,226												$ 1,634,920				(64,931,230)
Balance, shares at Dec. 31, 2013											12,226,558
Net income	24,691,248																										$ 24,691,248
Foreign currency translation adjustment, net of nil income taxes	66,678																						$ 66,678
Share-based compensation	4,062,159																		$ 4,062,159
Accretion of convertible redeemable preferred shares	(576,431)																		(495,159)								$ (81,272)
Issuance of Class A ordinary shares, upon initial public offering ("IPO"), net of issuance cost of US$4,031,356	92,223,639						$ 11,500												92,212,139
Issuance of Class A ordinary shares, upon initial public offering ("IPO"), net of issuance cost of US$4,031,356, shares							11,500,000
Issuance of Class A ordinary shares in private placement concurrent with the IPO	13,500,000						$ 1,500												13,498,500
Issuance of Class A ordinary shares in private placement concurrent with the IPO, shares							1,500,000
Conversion of convertible redeemable preferred shares to ordinary shares		$ 419,776	$ 16,324,300	$ 95,211,135								$ 7,196	$ 7,320	$ 10,915						$ 412,580	$ 16,316,980	$ 95,200,220
Conversion of convertible redeemable preferred shares to ordinary shares, shares												7,196,159	7,319,820	10,914,852
Issuance of Class A ordinary shares upon exercise of share options and vesting of non-vested shares	$ 248,812						$ 1,788												$ 247,024
Issuance of Class A ordinary shares upon exercise of share options and vesting of non-vested shares, shares							1,788,393
Conversion of Class B ordinary shares to Class A ordinary shares							$ 8,924				$ (8,924)
Conversion of Class B ordinary shares to Class A ordinary shares, shares							8,924,365				(8,924,365)
Reclassification of APIC and retained earnings																			$ (85,568,016)								$ 85,568,016
Balance at Dec. 31, 2014	$ 182,887,232						$ 23,712				$ 28,733								$ 135,886,427				$ 1,701,598				45,246,762
Balance, shares at Dec. 31, 2014					23,712,758	28,733,024	23,712,758				28,733,024
Net income	28,709,010																										$ 28,709,010
Foreign currency translation adjustment, net of nil income taxes	(6,607,017)																						$ (6,607,017)
Share-based compensation	5,286,891																		$ 5,286,891
Issuance of Class A ordinary shares upon exercise of share options and vesting of non-vested shares	$ 3,606,345						$ 3,044												$ 3,603,301
Issuance of Class A ordinary shares upon exercise of share options and vesting of non-vested shares, shares							3,043,652
Conversion of Class B ordinary shares to Class A ordinary shares							$ 18,158				$ (18,158)
Conversion of Class B ordinary shares to Class A ordinary shares, shares							18,158,128				(18,158,128)
Purchase of Class A ordinary shares	$ (7,738,834)														$ (7,738,834)
Balance at Dec. 31, 2015	$ 206,143,627						$ 44,914				$ 10,575				$ (7,738,834)				$ 144,776,619				$ (4,905,419)				$ 73,955,772
Balance, shares at Dec. 31, 2015					44,914,538	10,574,896	44,914,538				10,574,896

CONSOLIDATED STATEMENTS OF CHA7

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (DEFICIT) (Parenthetical) - USD ($)	1 Months Ended	12 Months Ended
	Apr. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY [Abstract]
Foreign currency translation adjustment, taxes
Issuance cost	$ 4,031,356		$ 4,031,356

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities:
Net income	$ 28,709,010	$ 24,691,248	$ 14,047,031
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,829,985	7,078,108	4,653,914
Bad debt expense	10,134,357	7,487,174	941,065
Loss on disposal of property and equipment	80,247	179,479	66,470
Deferred income tax benefit	(3,471,315)	(683,078)	(1,052,265)
Share-based compensation expense	5,286,891	4,062,159	764,746
Foreign currency exchange losses (gains), net	4,737,644	(1,075,257)	197,040
Changes in operating assets and liabilities
Accounts receivable	(10,744,445)	(16,762,469)	1,117,160
Prepaid expenses and other current assets	(2,931,799)	(2,495,692)	(534,531)
Accrued interest income on time deposits	(105,184)	(2,863,061)	(330,579)
Other non-current assets	(603,397)	(651,774)	(472,702)
Accounts payable	85,537	$ (45,050)	$ (7,038)
Amounts due to a related party	140,034
Income taxes payable	3,739,923	$ 2,383,557	$ 1,422,375
Deferred revenue	7,479,209	3,830,271	5,444,456
Accrued expenses and other current liabilities	4,645,423	1,929,718	3,393,767
Other non-current liabilities	(169,440)	1,394,535	54,642
Net cash provided by operating activities	55,842,680	28,459,868	29,705,551
Investing activities:
Purchase of property and equipment	(16,053,871)	(7,878,945)	(9,108,968)
Proceeds from disposal of property and equipment	169,233	156,216	50,060
Purchase of short term investments	(151,768,220)	(101,390,291)	(11,298,158)
Proceeds from maturity of short term investments	151,768,220	$ 101,390,291	$ 11,298,158
Purchase of cost method investments	(4,015,032)
Purchase of time deposits	(102,627,336)	$ (115,280,749)	$ (17,286,182)
Proceeds from maturity of time deposits	110,855,012	3,634,521	6,456,091
Issuance of housing loans to employees	(196,977)	(496,172)	(339,623)
Proceeds from repayment of housing loans from employees	254,103	406,589	691,492
Net cash used in investing activities	$ (11,614,868)	$ (119,458,540)	(19,537,130)
Financing activities:
Amounts received on behalf of a related party			141,329
Repayment of amounts received on behalf of a related party			(232,879)
Advances from a related party	$ 230,000		153,386
Repayment of advances from a related party	$ (230,000)		$ (153,386)
Issuance of Class A ordinary shares upon the IPO		$ 96,254,995
Issuance of Class A ordinary shares in private placement concurrent with the IPO		13,500,000
Issuance of Class A ordinary shares in connection with exercise of share options	$ 3,606,345	$ 248,812
Purchase of treasury shares	(7,738,834)
Payment of IPO costs		$ (3,532,025)	$ (499,331)
Net cash provided by (used in) financing activities	(4,132,489)	106,471,782	(590,881)
Effect of foreign currency exchange rate changes on cash and cash equivalents	(3,609,818)	1,047,426	364,495
Net increase in cash and cash equivalents	36,485,505	16,520,536	9,942,035
Cash and cash equivalents at beginning of year	42,659,791	26,139,255	16,197,220
Cash and cash equivalents at end of year	79,145,296	42,659,791	26,139,255
Supplemental disclosure of cash flow information:
Income taxes paid	360,686	567,401	$ 1,846,576
Non-cash investing and financing activities:
Accrual for purchase of equipment	$ 591,812	$ 286,144
Accrual of IPO costs			$ 107,866
Series A [Member]
Non-cash investing and financing activities:
Conversion of convertible redeemable preferred shares		$ 419,776	$ 80,224
Series B [Member]
Non-cash investing and financing activities:
Conversion of convertible redeemable preferred shares		16,324,300
Series C [Member]
Non-cash investing and financing activities:
Conversion of convertible redeemable preferred shares		$ 95,211,135

DESCRIPTION OF BUSINESS, ORGANI

DESCRIPTION OF BUSINESS, ORGANIZATION, BASIS OF PRESENTATION AND SIGNIFICANT CONCENTRATIONS AND RISKS	12 Months Ended
	Dec. 31, 2015
DESCRIPTION OF BUSINESS, ORGANIZATION, BASIS OF PRESENTATION AND SIGNIFICANT CONCENTRATIONS AND RISKS [Abstract]
DESCRIPTION OF BUSINESS, ORGANIZATION, BASIS OF PRESENTATION AND SIGNIFICANT CONCENTRATIONS AND RISKS	1 DESCRIPTION OF BUSINESS, ORGANIZATION, BASIS OF PRESENTATION AND SIGNIFICANT CONCENTRATIONS AND RISKS (a) Description of business Tarena International, Inc. (“Tarena International”), through its wholly-owned subsidiaries and consolidated variable interest entities or VIEs (collectively referred to hereinafter as the “Company”), is principally engaged in providing professional education services including professional information technology (“IT”) training courses and non-IT training courses across the People's Republic of China (“PRC”). To a lesser extent, the Company is also engaged in providing IT and non-IT training courses for children. All of the Company's operations are located in the PRC with nearly all of its customers located in the PRC. (b) Organization Tarena International is a holding company that was incorporated in the Cayman Islands on October 8, 2003 by Mr. Han Shaoyun (“Mr. Han”), the founder and chief executive officer of the Company, and five other individuals. Tarena International is the parent company of a number of wholly-owned subsidiaries that are engaged in professional education services. The Company's education services in certain locations of the PRC were previously conducted through Beijing Tarena Jinqiao Technology Co., Ltd. (“Beijing Tarena”) and Shanghai Tarena Software Technology Co., Ltd. (“Shanghai Tarena”) (collectively, the “Tarena Entities”), and their subsidiaries, in order to comply with the PRC laws and regulations which restricted foreign investments in companies that were engaged in education services. Tarena Entities and their subsidiaries were principally engaged in providing professional education services including professional IT training courses in those locations and operated 23 learning centers as of December 31, 2011. Pursuant to the VIE Agreements as described below, Tarena International has effective financial control over Tarena Entities and their initial capital funding was provided by Tarena Technologies Inc., (a wholly-owned subsidiary of Tarena International or the “WOFE”, formerly known as Beijing Tarena Technology Co., Ltd.). The recognized and unrecognized revenue-producing assets that were held by Tarena Entities and their subsidiaries primarily consisted of property and equipment, operating leases for the learning premises, ICP license, www.tmooc.cn website and assembled workforce in those learning centers. Because of change in PRC laws and regulations in 2012 which encourages foreign investments in education services, the Company began to transfer most of the operations, including related assets and liabilities of Tarena Entities and their subsidiaries to the wholly-owned subsidiaries of Tarena International. As of December 31, 2013, all of the learning center operations of Tarena Entities and their subsidiaries have been transferred to other subsidiaries of Tarena International. In 2015, Beijing Tarena invested US$ 2.9 The registered capital of Beijing Tarena and Shanghai Tarena is RMB2 million and RMB1 million, respectively. All of the equity interests of Tarena Entities are legally held by Mr. Han and Mr. Li Jianguang (“Mr. Li”), In accordance with Accounting Standards Codification (“ASC”) 810-10-25-38A, Tarena International has a controlling financial interest in Tarena Entities because Tarena International has (i) the power to direct activities of Tarena Entities that most significantly impact the economic performance of Tarena Entities; and (ii) the obligation to absorb the expected losses and the right to receive expected residual return of Tarena Entities that could potentially be significant to Tarena Entities. Thus, Tarena International is the primary beneficiary of the Tarena Entities. Under the terms of the VIE Agreements, Tarena International has (i) the right to receive economic benefits that could potentially be significant to Tarena Entities in the form of service fees under the exclusive business cooperation agreements; (ii) the right to receive all dividends declared by Tarena Entities and the right to all undistributed earnings of Tarena Entities; (iii) the right to receive the residual benefits of Tarena Entities through its exclusive option to acquire 100% of the equity interests in Tarena Entities, to the extent permitted under PRC law. Accordingly, the financial statements of Tarena Entities are consolidated in Tarena International's consolidated financial statements. Under the terms of the VIE Agreements, Tarena Entities' nominee equity holders have no rights to the net assets nor have the obligations to fund the deficit, and such rights and obligations have been vested to Tarena International. All of the equity (net assets) and net income of Tarena Entities are attributed to Tarena International. The key terms of the VIE Agreements are as follows: Loan Agreements: Exclusive Option Agreements: Exclusive Business Cooperation Agreements: Power of Attorney: Spousal Consent Letters: Equity Interest Pledge Agreements: Tarena International relies on the VIE Agreements to operate and control the Tarena Entities. However, these contractual arrangements may not be as effective as direct equity ownership in providing Tarena International with control over Tarena Entities. Any failure by Tarena Entities or the nominee equity holders to perform their obligations under the VIE Agreements would have a material adverse effect on the consolidated financial position and consolidated financial performance of the Company. All the VIE Agreements are governed by PRC law and provide for the resolution of disputes through arbitration in the PRC. Accordingly, these contracts would be interpreted in accordance with PRC law and any disputes would be resolved in accordance with PRC legal procedures. The legal system in the PRC is not as developed as some other jurisdictions, such as the United States. As a result, uncertainties in the PRC legal system could limit Tarena International's ability to enforce these contractual arrangements. In addition, if the legal structure and the VIE Agreements were found to be in violation of any existing or future PRC laws and regulations, Tarena International may be subject to fines or other legal or administrative sanctions. In the opinion of management, based on the legal opinion obtained from the Company's PRC legal counsel, the above contractual arrangements are legally binding and enforceable and do not violate current PRC laws and regulations. However, there are uncertainties regarding the interpretation and application of existing and future PRC laws and regulations. Accordingly, Tarena International cannot be assured that PRC regulatory authorities will not ultimately take a contrary view to its opinion. If the current ownership structure of the Company and the VIE Arrangements are found to be in violation of any existing or future PRC laws and regulations, the PRC government could: • revoke the business and operating licenses of the WOFE, its subsidiaries and Tarena Entities; • discontinue or restrict the conduct of any transactions between the WOFE, its subsidiaries and Tarena Entities; • impose fines, confiscate the income from Tarena Entities, or impose other requirements with which the Company may not be able to comply; • require Tarena International to restructure its ownership structure or operations, including terminating the contractual arrangements with Tarena Entities and deregistering the equity pledges of Tarena Entities; and • restrict or prohibit the use of the proceeds of future offering to finance the Company's business and operations in the PRC. If the imposition of any of these government actions causes Tarena International to lose its right to direct the activities of Tarena Entities or its right to receive substantially all the economic benefits and residual returns from Tarena Entities and Tarena International is not able to restructure its ownership structure and operations in a satisfactory manner, Tarena International would no longer be able to consolidate the financial results of Tarena Entities and their subsidiaries. In the opinion of management, the likelihood of deconsolidation of the Tarena Entities and their subsidiaries is remote based on current facts and circumstances. The equity interests of Tarena Entities are legally held by Mr. Han and Mr. Li as nominee equity holders on behalf of the Company. Mr. Han and Mr. Li are also directors of Tarena International. Mr. Li was jointly appointed by IDG Technology Venture Investments, L.P. and IDG Technology Venture Investment III, L.P. (collectively, the "IDG funds") and is a partner of IDG Capital Partners. Mr. Han and the IDG funds each held approximately 53.6% and 21.9% of the total voting rights of Tarena International as of December 31, 2015, respectively, assuming the exercise of all outstanding options beneficially held by Mr. Han (and his spouse) and Mr. Li as of such date. The Company cannot assure that when conflicts of interest arise, either of the nominee equity holders will act in the best interests of the Company or such conflicts will be resolved in the Company's favor. Currently, the Company does not have any arrangements to address potential conflicts of interest between the nominee equity holders and the Company, except that Tarena International could exercise the purchase option under the exclusive option agreement with the nominee equity holders to request them to transfer all of their equity ownership in Tarena Entities to a PRC entity or individual designated by Tarena International. The Company relies on the nominee equity holders, who are both Tarena International's directors and who owe a fiduciary duty to Tarena International, to comply with the terms and conditions of the contractual arrangements. Such fiduciary duty requires directors to act in good faith and in the best interests of Tarena International and not to use their positions for personal gains. If the Company cannot resolve any conflict of interest or dispute between the Company and the nominee equity holders of Tarena Entities, the Company would have to rely on legal proceedings, which could result in disruption of the Company's business and subject the Company to substantial uncertainty as to the outcome of any such legal proceedings. The Company's involvement with Tarena Entities under the VIE Agreements affected the Company's consolidated financial position, results of operations and cash flows as indicated below. The assets and liabilities of Tarena Entities and their subsidiaries that were included in the accompanying consolidated financial statements as of December 31, 2014 and 2015 are as follows: December 31, 2014 2015 US$ US$ Cash 243,292 160,614 Prepaid expenses and other current assets 25,166 153 Amounts due from related parties 4,394,839 3,866,683 Total current assets 4,663,297 4,027,450 Property and equipment, net 19,582 2,709 Cost method investments — 2,771,960 Other non-current assets — 40,917 Total assets 4,682,879 6,843,036 Income taxes payable 616,515 575,480 Accrued expenses and other current liabilities 103,231 137,408 Amounts due to related parties, including amounts due to WOFE for accrued service fees 3,486,740 6,053,190 Total current liabilities 4,206,486 6,766,078 Other non-current liabilities 43,664 41,145 Total liabilities 4,250,150 6,807,223 Amounts due from/to related parties represents the amounts due from/to Tarena International and its wholly-owned subsidiaries, which are eliminated upon consolidation. The financial performance and cash flows of Tarena Entities and their subsidiaries that were included in the accompanying consolidated financial statements for the years ended December 31, 2013, 2014 and 2015 are as follows: Year Ended December 31, 2013 2014 2015 US$ US$ US$ Net revenues 8,191,886 472,512 28,376 Net loss (1,917,256 ) (2,285,932 ) (387,902 ) Net cash used in operating activities (1,538,619 ) (610,826 ) (353,434 ) Net cash provided by (used in) investing activities (470,805 ) 66,824 (2,890,823 ) Net cash provided by financing activities 1,436,631 671,417 3,172,672 Effect of foreign currency exchange rate changes on cash 25,208 (70,821 ) (11,093 ) All of the assets of Tarena Entities and their subsidiaries can be used only to settle obligations of Tarena Entities and their subsidiaries. None of the assets of Tarena Entities and their subsidiaries have been pledged or collateralized. The creditors of Tarena Entities and their subsidiaries do not have recourse to the general credit of Tarena International and its wholly-owned subsidiaries. Assets of Tarena Entities and their subsidiaries that can be used only to settle obligations of Tarena Entities and their subsidiaries and liabilities of Tarena Entities and their subsidiaries for which creditors (or beneficial interest holders) do not have recourse to the general credit of Tarena International and its wholly owned subsidiaries have been presented parenthetically alongside each balance sheet caption on the face of the consolidated balance sheets. During the periods presented, Tarena International and its wholly-owned subsidiaries provided financial support to Tarena Entities that they were not previously contractually required to provide in the form of advances. To the extent Tarena Entities require financial support, pursuant to the exclusive business cooperation agreements, the WOFE may, at its option and to the extent permitted under the PRC law, provide such support to Tarena Entities through loans to Tarena Entities' nominee equity holders or entrustment loans to Tarena Entities. (c) Basis of presentation The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). (d) Significant concentrations and risks Revenue concentration A substantial portion of the Company's total net revenues are generated from Digital Arts and Java courses. The percentages of the Company's total net revenues from Digital Arts and Java training courses are as follows: Year Ended December 31, 2013 2014 2015 Digital Arts 6.7 % 29.1 % 32.2 % Java 59.3 % 36.7 % 28.8 % Total 66.0 % 65.8 % 61.0 % The Company expects net revenues from these two training courses to continue to represent a substantial portion of its total net revenues in the future. Negative factors that adversely affect net revenues generated by these two training courses will have a material adverse effect on the Company's business, financial condition and results of operations. There were no other courses that represented revenues greater than 10% of total revenues. A substantial portion of the Company's students financed their tuition fees through the loans offered to them by CreditEase Business Consulting (Beijing) Co., Ltd., Bank of China Consumer Finance Co., Ltd. and Bank of Beijing Consumer Finance Company during the three-year period ended December 31, 2015. The Company expects students financed by these companies to continue to represent a substantial portion of its total students in the future. The Company believes other companies could provide similar loans to its students on comparable terms. However, negative factors that adversely affect these companies will have a material adverse effect on the Company's business, financial condition and results of operations. Geographic concentration A substantial portion of the Company's total net revenues are derived from its business operations in Beijing and Hangzhou. The percentages of the Company's total net revenues generated from its business operations in Beijing and Hangzhou are as follows: Year Ended December 31, 2013 2014 2015 Hangzhou 5.3 % 25.5 % 33.0 % Beijing 36.1 % 15.5 % 12.3 % Total 41.4 % 41.0 % 45.3 % The Company expects revenues derived from its business operations in Beijing and Hangzhou to continue to represent a significant portion of its total net revenues. Negative factors that adversely affect professional education services in Beijing or Hangzhou will have a material adverse effect on the Company's business, financial condition and results of operations. There were no other cities that represented revenues greater than 10% of total revenues.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2015
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	2 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (a) Principles of consolidation The consolidated financial statements include the financial statements of Tarena International, its wholly-owned subsidiaries, VIEs in which Tarena International is the primary beneficiary and their wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated upon consolidation. (b) Use of estimates The preparation of consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the collectability of accounts receivable, the fair values of share-based compensation awards, the realizability of deferred income tax assets, the accruals for tax uncertainties and other contingencies, the recoverability of the carrying amounts of property and equipment and the useful lives of property and equipment. The current economic environment has increased the degree of uncertainty inherent in those estimates and assumptions. (c) Foreign currency The accompanying consolidated financial statements have been expressed in U.S. dollar (“USD”), the Company's reporting currency. The functional currency of Tarena International and Tarena Hong Kong Limited (“Tarena HK”) is the USD. The functional currency of Tarena International's PRC subsidiaries, consolidated VIEs, and the subsidiaries of the VIEs is the Renminbi (“RMB”). Transactions denominated in currencies other than the functional currency are translated into the functional currency at the exchange rates prevailing at the date of the transaction. Monetary assets and liabilities denominated in foreign currencies are translated into the functional currency using the applicable exchange rate at the balance sheet date. The resulting exchange differences are recorded in foreign currency exchange gains (losses) in the consolidated statements of comprehensive income. Assets and liabilities of entities with functional currencies other than USD are translated into USD using the exchange rate on the balance sheet date. Revenues and expenses are translated into USD at average rates prevailing during the reporting period. The resulting foreign currency translation adjustment are recorded in accumulated other comprehensive income (loss) within shareholders' equity. Since the RMB is not a fully convertible currency, all foreign exchange transactions involving RMB must take place either through the People's Bank of China (the “PBOC”) or other institutions authorized to buy and sell foreign exchange. The exchange rates adopted for the foreign exchange transactions are the rates of exchange quoted by the PBOC. (d) Cash, cash equivalents, time deposits and restricted time deposits Cash consist of cash on hand and cash in bank, which are unrestricted as to withdrawal. Cash equivalents consist of interest-bearing certificates of deposit with initial term of no more than three months when purchased. Time deposits, which mature within one year as of the balance sheet date, represent interest-bearing certificates of deposit with an initial term of greater than three months when purchased. Time deposits which mature over one year as of the balance sheet date are included in non-current assets. Time deposits that are pledged as collateral for line of credit with a financial institution in the U.S. with an initial term of greater than three months when purchased are reported as restricted time deposits. Cash, cash equivalents, time deposits and restricted time deposits maintained at banks consist of the following: December 31, 2014 2015 US$ US$ RMB denominated bank deposits with financial institutions in the PRC 58,639,210 96,579,459 US dollar denominated bank deposits with a financial institutions in the PRC 36,216,381 8,112,557 US dollar denominated bank deposits with financial institutions in Hong Kong Special Administrative Region (“HK SAR”) 771,786 99,358 HK dollar denominated bank deposits with a financial institution in HK SAR 7 15,181 RMB denominated bank deposits with a financial institution in HK SAR 412 389 RMB denominated bank deposits with financial institutions in the U.S. - 84,296,524 RMB denominated bank deposits with financial institutions in Singapore 71,178,287 - US dollar denominated bank deposits with financial institutions in the U.S. - 8,501 To limit exposure to credit risk relating to bank deposits, the Company primarily places bank deposits only with large financial institutions in the PRC, HK SAR, Singapore and the U.S. with acceptable credit rating. (e) Short-term investment During the years ended December 31, 2013, 2014 and 2015, the Company invested US$ 11,298,158 101,390,291 151,768,220 39,930 757,300 957,373 (f) Accounts receivable Accounts receivable primarily represent tuition fees due from students. Accounts receivable which are due over one year as of the balance sheet date are presented as non-current assets. The unearned interest on accounts receivable which are due over one year is reported in the consolidated balance sheets as a direct deduction from the principal amount of accounts receivable. See note 2 (i). The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. Accounts receivable is considered past due based on its contractual terms. In establishing the allowance, management considers historical losses, the students' financial condition, the amount of accounts receivables in dispute, the accounts receivables aging and the students' payment patterns. Accounts receivable which are deemed to be uncollectible are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. There is a time lag between when the Company estimates a portion of or the entire account balances to be uncollectible and when a write off of the account balances is taken. The Company takes a write off of the account balances when the Company can demonstrate all means of collection on the outstanding balances have been exhausted or the balances have been overdue for more than three years. (g) Property and equipment Property and equipment are recorded at cost. Depreciation is calculated on the straight-line method over the estimated useful lives of the assets. The estimated useful life of property and equipment is as follows: Furniture 5 Office equipment 3 4 Leasehold improvements Shorter of the lease term or the estimated useful life of the assets Ordinary maintenance and repairs are charged to expenses as incurred, while replacements and betterments are capitalized. When items are retired or otherwise disposed of, income is charged or credited for the difference between net book value of the item disposed and proceeds realized thereon. Property and equipment are reviewed for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. Recoverability of a long-lived asset or asset group to be held and used is measured by a comparison of the carrying amount of an asset or asset group to the estimated undiscounted future cash flows expected to be generated by the asset or asset group. If the carrying value of an asset or asset group exceeds its estimated undiscounted future cash flows, an impairment loss is recognized by the amount that the carrying value exceeds the estimated fair value of the asset or asset group. Fair value is determined through various valuation techniques including discounted cash flow models, quoted market values and third party independent appraisals, as considered necessary. Assets to be disposed are reported at the lower of carrying amount or fair value less costs to sell, and are no longer depreciated. No impairment of long-lived assets was recognized for any of the years presented. (h) Cost method investments Investments in entities in which the Company does not have an ability to exercise significant influence over the operating and financial matters of the investees and which do not have readily determinable fair value are accounted for using the cost method, under which the Company carries the investments at cost and recognizes as income for any dividend received from distribution of the investees' earnings. The Company evaluates each cost method investment for impairment on a quarterly basis and recognizes an impairment loss if a decline in value is determined to be other-than-temporary. Such impairment evaluation includes, but not limited to: the current business environment; going concern considerations such as financial condition, the utilization of cash, ability to obtain additional financing to achieve its business plan, recent rounds of financing and comparable valuations. (i) Revenue recognition Revenue is recognized when all of the following conditions are met: persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price is fixed or determinable and collectability is reasonably assured. These criteria as they relate to each of the following major revenue generating activities are described below. Revenue is presented net of business tax and value added taxes (“VAT”) at rates ranging between 3% and 6%, and surcharges. VAT and business tax collected from customers, net of VAT paid for purchases, is recorded as a liability in the consolidated balance sheets until it is paid to the tax authorities. Tuition fees Educational and professional tuition fees are recognized as revenue ratably over the period of the training course, which primarily range from four to five months. The unearned portion of tuition fees is recorded as deferred revenue. Certain qualified students are allowed to pay their tuition fees on installment for a period of time exceeding one year. When tuition services are sold on installment terms that exceeds one year beyond the point in time that revenue is recognized, the receivable, and therefore the revenue is recorded at the present value of the payments. The difference between the present value of the receivable and the nominal or principal value of the tuition fees is recognized as interest income over the contractual repayment period using the effective interest rate method. The interest rate used to determine the present value of total amount receivable is the rate at which the students can obtain financing of a similar nature from other sources at the date of the transaction. Certification service revenue The Company provides certification service to students who complete the training course and enroll for the exams. The Company is responsible for the certification service, including organization, proctoring and grading of exams. All certificates are issued by third parties to the students who pass the exam. The Company acts as the principal in providing this service and recognizes revenue on gross basis because the Company is the primary obligor in the arrangement and is responsible for fulfilling the ordered services by the students. Cash received before the students taking the exam, is recorded as deferred revenue, and subsequently recognized as certification service revenue upon completion of the certification service, which occurs when the certificates are provided to the students. (j) Cost of revenues Cost of revenues consists of payroll and employee benefits, rent expenses of learning centers, depreciation relating to property and equipment used for operating the learning centers, and other operating costs that are directly attributed to the provision of training services. (k) Advertising costs Advertising costs are expensed as incurred and included in selling and marketing expenses. Advertising costs were US$ 11,570,458 16,738,921 24,336,415 (l) Operating lease The Company leases premises for learning centers and offices under non-cancellable operating leases. Leases with escalated rent provisions are recognized on a straight-line basis commencing with the beginning of the lease term. There are no capital improvement funding, other lease concessions or contingent rent in the lease agreements. The lease terms of the Company's learning centers range between 1 10 Certain learning centers of the Company sublease a portion of the areas to certain students for their living accommodation. Income from subleases is recognized on a straight-line basis over the term of the lease and recognized as reduction of costs of revenues. (m) Government grant Government grant is recognized when there is reasonable assurance that the Company will comply with the conditions attach to it and the grant will be received. Government grant for the purpose of giving immediate financial support to the Company with no future related costs or obligation is recognized in the Company's consolidated statements of comprehensive income when the grant becomes receivable. Government grants of US$ 1,254,332 1,613,436 939,646 (n) Research and development expense Research and development costs are expensed as incurred. (o) Employee benefits Pursuant to relevant PRC regulations, the Company is required to make contributions to various defined contribution plans organized by municipal and provincial PRC governments. The contributions are made for each PRC employee at rates ranging from 25.5 52.5 5,850,415 8,385,747 11,140,810 (p) Income taxes Income taxes are accounted for under the asset and liability method. Deferred income tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and tax loss and tax credit carry forwards. Deferred income tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the periods in which those temporary differences are expected to be recovered or settled. The effect on deferred income tax assets and liabilities of a change in tax rates or tax laws is recognized in the consolidated statements of comprehensive income in the period the change in tax rates or tax laws is enacted. A valuation allowance is provided to reduce the carrying amount of deferred income tax assets if it is considered more likely than not that some portion or all of the deferred income tax assets will not be realized. The Company recognizes in the consolidated financial statements the impact of a tax position, if that position is more likely than not of being sustained upon examination, based on the technical merits of the position. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company has elected to classify interest and penalties related to an unrecognized tax benefits, if and when required, as part of income tax expense in the consolidated statements of comprehensive income. (q) Deferred offering costs Deferred offering costs consist principally of legal, printing and registration costs in connection with the IPO. Upon completion of the IPO on April 3, 2014, the deferred offering costs of US$ 615,793 (r) Share based compensation The Company measures the cost of employee services received in exchange for an award of equity instruments based on the grant-date fair value of the award and recognizes the cost over the period the employee is required to provide service in exchange for the award, which generally is the vesting period. The Company recognizes compensation cost for an award with only service conditions that has a graded vesting schedule on a straight-line basis over the requisite service period for the entire award, net of estimated forfeitures, provided that the cumulative amount of compensation cost recognized at any date at least equals the portion of the grant-date value of such award that is vested at that date. Forfeiture rates are estimated based on historical and future expectations of employee turnover rates. (s) Commitments and contingencies In the normal course of business, the Company is subject to loss contingencies, such as legal proceedings and claims arising out of its business, that cover a wide range of matters, including, among others, government investigations, shareholder lawsuits, and non-income tax matters. An accrual for a loss contingency is recognized when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. If a potential material loss contingency is not probable but is reasonably possible, or is probable but cannot be estimated, then the nature of the contingent liability, together with an estimate of the range of possible loss if determinable and material, is disclosed. The allowance for off-balance-sheet credit exposures is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to the guarantee under the Student Loan Program. See note 10. The Company evaluates the current status of the payment and performance risk of the guarantee based on periodic evaluations of the actual defaults, estimated future defaults, current understanding of the students' status and existing economic conditions. (t) Earnings (loss) per share Basic earnings (loss) per Class A and Class B ordinary share is computed by dividing net income (loss) attributable to Tarena International's Class A and Class B ordinary shareholders by the weighted average number of Class A and Class B ordinary shares outstanding during the year using the two-class method. Under the two-class method, net income (loss) attributable to Tarena International's Class A and Class B ordinary shareholders is allocated between Class A and Class B ordinary shares and other participating securities, if any, based on participating rights in undistributed earnings. Tarena International's Series A convertible redeemable preferred shares, Series B convertible redeemable preferred shares and Series C convertible redeemable preferred shares were participating securities since the holders of these securities participated in dividends on the same basis as Class A and Class B ordinary shareholders. These participating securities were not included in the computation of basic loss per Class A and Class B ordinary share in periods when the Company reported net loss, because these participating security holders have no obligation to share in the losses of Tarena International based on the contractual rights and obligations of these participating securities. Diluted earnings (loss) per share is calculated by dividing net income (loss) attributable to Tarena International's Class A (u) Segment reporting The Company uses the management approach in determining its operating segments. The management approach considers the internal reporting used by the Company's chief operating decision maker for making decisions about the allocation of resources to and the assessment of the performance of the segments of the Company. Management has determined that the Company has one operating segment, which is the training segment. All of the Company's operations and customers are located in the PRC. Consequently, no geographic information is presented. (v) Fair value measurements The Company applies the provisions of ASC Topic 820, Fair Value Measurements and Disclosures, ASC Topic 820 establishes a fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. ASC Topic 820 establishes three levels of inputs that may be used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to measurements involving significant unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows: • Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. • Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. • Level 3 inputs are unobservable inputs for the asset or liability. The level in the fair value hierarchy within which a fair value measurement in its entirety falls is based on the lowest level input that is significant to the fair value measurement in its entirety. In situations where there is little, if any, market activity for the asset or liability at the measurement date, the fair value measurement reflects management's own judgments about the assumptions that market participants would use in pricing the asset or liability. Those judgments are developed by management based on the best information available in the circumstances. The carrying amounts of cash and cash equivalents, time deposits, restricted time deposits, accounts receivable, housing loans to employees, accounts payable, amount due to a related party, accrued expenses and other current liabilities as of December 31, 2014 and 2015 approximate their fair value because of short maturity of these instruments. The carrying amounts of non-current time deposits as of December 31, 2014 and 2015 approximates their fair value since the interest rates of the time deposits did not differ significantly from the market interest rates for similar types of time deposits. The fair values of time deposits and restricted time deposits as of December 31, 2014 and 2015 are categorized as Level 2 measurement. (w) Recently issued accounting standards The Financial Reporting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers, in May 2014. ASU 2014-09 requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. An entity should also disclose sufficient quantitative and qualitative information to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. In December 2015, the FASB issued ASU No. 2015-14, Revenue from contracts with customers, which deferred the effective date of ASU 2014-09. The new standard is effective for annual reporting periods beginning after December 15, 2017. The Company will implement the provisions of ASU 2014-09 as of January 1, 2018. The Company has not yet determined the impact of the new standard on its current policies for revenue recognition. In 2015, the Company elected to early adopt the ASU 2015-17, Balance Sheet Classification of Deferred Taxes , which requires entities with a classified balance sheet to present all deferred tax assets and liabilities as noncurrent. The Company adopted this new guidance retrospectively. As a result of adoption of this guidance, the Company reclassified current deferred income tax assets in the amount of USD2.1 million to other noncurrent assets as of December 31, 2014. There was no impact on results of operations or cash flows as a result of this guidance. The FASB issued Accounting Standards Codification (“ASC”) Topic 842, Leases , in February 2016. ASC Topic 842 requires a lessee to recognize all leases, including operating leases, on balance sheet via a right-of-use asset and lease liability, unless the lease is a short-term lease (one with an accounting lease term of 12 months or less). All (or a portion of) fixed payments by the lessee to cover lessor costs related to ownership of the underlying assets, or executory costs, that do not represent payments for a good or service will be considered lease payments and reflected in the measurement of lease assets and lease liabilities by lessees. The new standard does not substantially change lessor accounting from current U.S. GAAP. The new standard also requires lessees and lessors to disclose more qualitative and quantitative information about their leases than current U.S. GAAP does. The standard is applied retrospectively, with elective reliefs. The new standard is effective for annual and interim reporting periods beginning after December 15, 2018 for a public business entity. Early adoption is permitted. The Company has not yet determined the impact of the new standard on its current policies for leases.

ACCOUNTS RECEIVABLE

ACCOUNTS RECEIVABLE	12 Months Ended
	Dec. 31, 2015
ACCOUNTS RECEIVABLE [Abstract]
ACCOUNTS RECEIVABLE	3 ACCOUNTS RECEIVABLE Accounts receivable consists of the following: December 31, 2014 2015 US$ US$ Accounts receivable: Gross 32,420,858 36,593,434 Unearned interest (1,971,843 ) (2,463,474 ) Total accounts receivable 30,449,015 34,129,960 Less: allowance for doubtful accounts (5,776,525 ) (10,295,762 ) Accounts receivable, net 24,672,490 23,834,198 The classification of accounts receivable is as follows: December 31, 2014 2015 US$ US$ Accounts receivable, net – current portion 23,184,239 22,637,451 Accounts receivable, net – non-current portion 1,488,251 1,196,747 Total accounts receivable, net 24,672,490 23,834,198 The movements of the allowance for doubtful accounts are as follows: Year Ended December 31, 2013 2014 2015 US$ US$ US$ Balance at the beginning of the year 1,306,306 2,303,029 5,776,525 Additions charged to bad debt expense 941,065 7,487,174 10,134,357 Write-off of bad debt allowance — (4,035,620 ) (5,073,810 ) Foreign currency translation adjustment 55,658 21,942 (541,310 ) Balance at the end of the year 2,303,029 5,776,525 10,295,762 The aging analysis of our accounts receivable based on due date is as follows: As of December 31, 2014 2015 US$ US$ Aging: – current 11,940,237 16,072,343 – 1-3 months past due 5,058,887 5,698,759 – 4-6 months past due 4,139,377 2,059,362 – 7-12 months past due 6,119,995 2,774,243 – greater than one year past due 3,190,519 7,525,253 Total accounts receivable 30,449,015 34,129,960

PREPAID EXPENSES AND OTHER CURR

PREPAID EXPENSES AND OTHER CURRENT ASSETS	12 Months Ended
	Dec. 31, 2015
PREPAID EXPENSES AND OTHER CURRENT ASSETS [Abstract]
PREPAID EXPENSES AND OTHER CURRENT ASSETS	4 PREPAID EXPENSES AND OTHER CURRENT ASSETS Prepaid expenses and other current assets consist of the following: December 31, 2014 2015 US$ US$ Prepaid expenses and other current assets: Prepaid rental expenses 2,260,000 2,760,388 Interest receivable from time deposits 2,556,518 1,768,667 Prepaid advertising deposits 175,682 1,690,126 Prepaid advertising expenses 1,751,146 1,538,659 Prepaid value-added tax 715,157 1,105,122 Housing loans made to employees (a) 436,467 352,655 Staff advances (b) 81,903 65,153 Others (c) 753,251 899,041 Total prepaid expenses and other current assets 8,730,124 10,179,811 (a) The Company provided one-year housing loans to the employees to help them finance their purchase of apartments. (b) Staff advances are provided to staff for traveling and related expenses and are expensed when incurred. (c) Others mainly represent other deposits, professional fees and other miscellaneous prepaid expenses.

PROPERTY AND EQUIPMENT, NET

PROPERTY AND EQUIPMENT, NET	12 Months Ended
	Dec. 31, 2015
PROPERTY AND EQUIPMENT, NET [Abstract]
PROPERTY AND EQUIPMENT, NET	5 PROPERTY AND EQUIPMENT, NET Property and equipment consists of the following: December 31, 2014 2015 US$ US$ Furniture 934,033 1,618,584 Office equipment 23,583,820 32,552,762 Leasehold improvements 5,525,229 8,181,251 Total property and equipment 30,043,082 42,352,597 Less: accumulated depreciation (16,669,132 ) (22,661,818 ) Property and equipment, net 13,373,950 19,690,779 Depreciation expense for property and equipment was allocated to the following: Year Ended December 31, 2013 2014 2015 US$ US$ US$ Cost of revenues 4,001,726 6,200,645 7,797,649 Selling and marketing expenses 278,094 366,819 432,695 General and administrative expenses 347,904 431,246 486,820 Research and development expenses 26,190 79,398 112,821 Total 4,653,914 7,078,108 8,829,985

COST METHOD INVESTMENTS

COST METHOD INVESTMENTS	12 Months Ended
	Dec. 31, 2015
COST METHOD INVESTMENTS [Abstract]
COST METHOD INVESTMENTS	6 COST METHOD INVESTMENTS Cost method investments consist of the following which were accounted for under cost method because the Company does not have the ability to exercise significant influence over the entities. December 31, 2014 2015 US$ US$ Sino-German Know-How Education Investment Co., Ltd. (a) — 1,847,973 Juesheng.com (b) — 769,989 Mxsoft.com (c) — 615,991 Other cost method investments (d) — 461,993 Total — 3,695,946 (a) In October 2015, the Company paid RMB 12,000,000 2.86 (b) In November 2015, the Company paid RMB 5,000,000 0.50 (c) In August 2015, the Company paid RMB 4,000,000 5.71 (d) As of December 31, 2015, the Company paid RMB 3,000,000 1.43 0.74 two

ACCRUED EXPENSES AND OTHER CURR

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES	12 Months Ended
	Dec. 31, 2015
ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES [Abstract]
ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES	7 ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES December 31, 2014 2015 US$ US$ VAT and other tax payables 1,913,361 2,825,427 Accrued payroll and employee benefits 4,389,540 5,758,853 Others 2,136,509 3,710,193 Total 8,439,410 12,294,473 Others mainly represent current deferred income under American Depositary Receipt program, accrual for employee reimbursement, rental expenses and other miscellaneous expenses.

NET REVENUES

NET REVENUES	12 Months Ended
	Dec. 31, 2015
NET REVENUES [Abstract]
NET REVENUES	8 NET REVENUES Net revenues consist of the following: Year Ended December 31, 2013 2014 2015 US$ US$ US$ Tuition fee 92,927,773 135,932,251 188,641,628 Certification service fee 2,001,705 2,936,647 4,411,095 Others 897,862 467,433 182,310 Business taxes and surcharges (2,993,680 ) (3,132,314 ) (4,045,503 ) Total net revenues 92,833,660 136,204,017 189,189,530 Others mainly represent miscellaneous fees, including franchise fee and guarantee fee (see note 10(b)).

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2015
INCOME TAXES [Abstract]
INCOME TAXES	9 INCOME TAXES Under the current laws of the Cayman Islands, Tarena International is not subject to tax on its income or capital gains. For the period from its inception on October 22, 2012 to December 31, 2015, Tarena HK did not have any assessable profits arising in or derived from HK SAR. Tarena International's PRC subsidiaries and consolidated VIEs and the subsidiaries of the VIEs file separate tax returns in the PRC. Effective from January 1, 2008, the PRC statutory income tax rate is 25% according to the Corporate Income Tax (“CIT”) Law which was passed by the National People's Congress on March 16, 2007. Under the CIT Law, entities that qualify as “Advanced and New Technology Enterprise” (“ANTE”) are entitled to a preferential income tax rate of 15%. In 2009, the WOFE qualified as an ANTE, which entitled it to the preferential income tax rate of 15% from January 1, 2009 to December 31, 2011. In 2012, the WOFE renewed its ANTE qualification, which entitled it to the preferential income tax rate of 15% from January 1, 2012 to December 31, 2014. In 2015, the WOFE renewed its ANTE qualification, which entitled it to the preferential income tax rate of 15% from January 1, 2015 to December 31, 2017. Tarena Software Technology (Hangzhou) Co., Ltd. (“Tarena Hangzhou”) was established in 2013 and qualified as an eligible software enterprise. As a result of this qualification, it is entitled to a tax holiday of a two-year full exemption followed by a three-year 50% exemption, commencing from the year in which its taxable income is greater than zero. As a result, its income tax rate for the years ended December 31, 2013, 2014 and 2015 were 25 nil nil Certain Tarena International's subsidiaries and branches qualified as “Small Profit Enterprises” in 2013, 2014 and 2015, and therefore are subject to the preferential income tax rate of 20% or 10%. According to the approvals from the tax authorities in certain locations in the PRC, Tarena International's subsidiaries and consolidated VIEs and the subsidiaries of the VIEs that are based in these locations are required to use the deemed profit method to determine their income tax. Under the deemed profit method, these subsidiaries are subject to income tax at 25% on its deemed profit which is calculated based on revenues less deemed expenses equal to 85% and 90% of revenues. The components of income before income taxes are as follows: Year Ended December 31, 2013 2014 2015 US$ US$ US$ PRC 16,533,265 23,827,863 32,246,850 Hong Kong (182,447 ) (319,685 ) (306,499 ) Cayman Islands (32,461 ) 3,587,894 (2,594,280 ) Total income before income taxes 16,318,357 27,096,072 29,346,071 Income tax expense consists of the following: Year Ended December 31, 2013 2014 2015 US$ US$ US$ Current income tax expense 3,323,591 3,087,902 4,108,376 Deferred income tax benefit (1,052,265 ) (683,078 ) (3,471,315 ) Total 2,271,326 2,404,824 637,061 The actual income tax expense reported in the consolidated statements of comprehensive income for each of the years ended December 31, 2013, 2014 and 2015 differs from the amount computed by applying the PRC statutory income tax rate to income before income taxes due to the following: Year Ended December 31, 2013 2014 2015 PRC statutory income tax rate 25.0 % 25.0 % 25.0 % Increase (decrease) in effective income tax rate resulting from: Cayman and HK entities not subject to income taxes 0.3 % (3.0 )% 2.5 % Research and development bonus deduction (3.3 )% (2.7 )% (3.3 )% Non-deductible selling, general and administrative expenses Share based compensation 1.2 % 3.8 % 4.5 % Other non-deductible selling, general and administrative expenses 0.4 % 0.5 % 0.6 % ANTE preferential tax rate (10.2 )% (1.0 )% 0.1 % Tarena Hangzhou preferential tax rate 1.4 % (0.1 )% 0.7 % Change in valuation allowance (0.9 ) % 6.4 % 3.1 % Tarena Hangzhou tax holiday - (20.0 )% (31.1 )% Deemed profit method differential (0.2 )% (0.1 )% (0.0 )% Others 0.2 % 0.1 % 0.1 % Actual income tax expense 13.9 % 8.9 % 2.2 % Basic and diluted per Class A ordinary share and Class B ordinary share effect of the Company's tax holiday for the year ended December 31, 2014 and 2015 was US$ 0.10 0.17 The principal components of deferred income tax assets are as follows: December 31, 2014 2015 US$ US$ Deferred income tax assets: Accounts receivable 2,729,700 5,330,829 Tax loss carry forwards 691,350 1,087,954 Advertising expense 1,151,432 2,104,573 Total deferred income tax assets 4,572,482 8,523,356 Valuation allowance (2,347,093 ) (3,097,761 ) Deferred income tax assets, net 2,225,389 5,425,595 The movements of the valuation allowance are as follows: Year Ended December 31, 2013 2014 2015 US$ US$ US$ Balance at the beginning of the year 731,828 598,117 2,347,093 Additions of valuation allowance 525,061 1,823,101 1,456,539 Reduction of valuation allowance (678,916 ) (78,687 ) (532,478 ) Foreign currency translation adjustment 20,144 4,562 (173,393 ) Balance at the end of the year 598,117 2,347,093 3,097,761 The valuation allowance as of December 31, 2014 and 2015 was primarily provided for the deferred income tax assets of certain Tarena International's PRC subsidiaries, consolidated VIEs, and the subsidiaries of the VIEs, which were at cumulative loss positions. In assessing the realization of deferred income tax assets, management considers whether it is more likely than not that some portion or all of the deferred income tax assets will not be realized. 4,351,816 11,608 89,528 1,760,046 2,490,634 The CIT Law and its implementation rules impose a withholding income tax at 10%, unless reduced by a tax treaty or arrangement, on the amount of dividends distributed by a PRC-resident enterprise to its immediate holding company outside the PRC that are related to earnings accumulated beginning on January 1, 2008. Dividends relating to undistributed earnings generated prior to January 1, 2008 are exempt from such withholding income tax. The Company has considered temporary differences on the book to tax differences pertaining to all investment in subsidiaries including the determination of the indefinite reinvestment assertion that would apply to each foreign subsidiary. The Company evaluated each entity's historical, current business environment and plans to indefinitely reinvest all earnings accumulated in its respective jurisdiction for purpose of future business expansion. Due to the plan to indefinitely reinvest its earnings in the PRC, the Company has not provided for deferred income tax liabilities on undistributed earnings of US$ 77,848,789 93,048,180 A reconciliation of the beginning and ending amount of total unrecognized tax benefits for the years ended December 31, 2013, 2014 and 2015 is as follows: Year Ended December 31, 2013 2014 2015 US$ US$ US$ Balance at beginning of year 1,700,106 3,077,693 6,033,774 Increase related to current year tax positions 2,843,585 5,768,868 8,198,639 Settlement (1,539,717 ) (2,813,061 ) (5,551,468 ) Foreign currency translation adjustment 73,719 274 (456,918 ) Balance at end of year 3,077,693 6,033,774 8,224,027 US$ 5,822,319 7,576,459 No 4,849,529 6,543,175 384,686 569,729 799,559 1,111,123 7,654,298 According to the PRC Tax Administration and Collection Law, the statute of limitation is three years if the underpayment of taxes is due to computational errors made by the taxpayer or the withholding agent. The statute of limitation is extended to five years under special circumstances where the underpayment of taxes is more than RMB100,000. In the case of transfer pricing issues, the statute of limitation is 10 years. There is no statute of limitation in the case of tax evasion. The income tax returns of Tarena International's PRC subsidiaries, consolidated VIEs, and the subsidiaries of the VIEs for the years from 2011 to 2015 are open to examination by the PRC tax authorities.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2015
RELATED PARTY TRANSACTIONS [Abstract]
RELATED PARTY TRANSACTIONS	10 RELATED PARTY TRANSACTIONS During the years ended December 31, 2013, 2014 and 2015, the Company entered into related party transactions with Mr. Han, Chuanbang Business Consulting (Beijing) Co., Ltd. (“Chuanbang”), which is wholly owned by Mr. Han, and Precise Advance Limited (“Precise”), which is owned by an executive of the Company's shareholder. The significant related party transactions are summarized as follows: Year Ended December 31, 2013 2014 2015 US$ US$ US$ Transactions with Chuanbang Tuition fees paid under the Student Loan Program (a) 8,672,904 — — Guarantee fee (b) 90,490 18,188 — Amounts received under the Student Loan Program (c) (141,329 ) — — Repayment of amounts received under the Student Loan Program (c) 232,879 — — Advances from Chuanbang (d) (153,386 ) — — Repayment of advances from Chuanbang (d) 153,386 — — Cash collection service fee (e) 64,586 108,068 329,767 Transactions with others Advances from Precise (f) — — (230,000 ) Repayment of advances from Precise (f) — — 230,000 Notes: (a) Starting from the second half of 2011, the Company began to refer its students who need financial assistance for the payment of their tuition fees to Chuanbang. Chuanbang is a person-to-person or a “peer-to-peer” (P2P) lending intermediary that assists students in obtaining loans to pay for their tuition fees by identifying potential third-party individual lenders (the “Student Loan Program”). The third-party lenders remit cash to Mr. Han, who is a representative of Chuanbang, rather than directly to the Company, because the P2P arrangement is between Chuanbang (rather than the Company) and the third party individual lenders. As a P2P lending intermediary and pursuant to the relevant agreements between the two parties, Chuanbang is responsible for processing payments from student borrowers and forwarding those payments to individual lenders. The Company has no direct involvement in or is a party to the P2P arrangement, other than serving as the guarantor of the student loans. The role of the third-party individual lenders is to provide the students with funding of the student loans that are arranged or identified by Chuanbang. Under the Student Loan Program, before the training courses commence, the students entered into loan agreements with Mr. Han, a designated representative of Chuanbang, to borrow an amount equal to the total amount of the tuition fees. The repayment term of the loan agreements ranges between 12 and 20 months. Shortly thereafter, Mr. Han assigned such loan agreements to third party individual lenders (including certain employees and a director of the Company), with the Company serving as the guarantor of the loan amount. The terms of the assignment agreements between Mr. Han and the third party individual lenders are identical to the terms of the loan agreements between the students and Mr. Han, except that the interest rate charged to the students by Mr. Han is higher than the interest rate charged to Mr. Han by the third party individual lenders. The interest rate differential represents the compensation to Mr. Han for the estimated costs he incurred to originate and will incur to service the student loans as well as the amount payable to the Company for guaranteeing the student loans. Upon the receipt of the cash from the third party individual lenders, Mr. Han remits the cash to the Company on behalf of students for the payment of the students' tuition fees. In substance, the Company has agreed to guarantee amounts borrowed by the students (indirectly from third-party individual lenders through Mr. Han) to purchase the training services of the Company. The terms of the guarantee coincide with the terms of loan agreements, which range between 12 20 217,356 nil Upon the inception of the guarantee, the Company recognized a liability based on the estimated fair value of the guarantee. The liability is amortized over the term of the guarantee. The balance of the liability, which is included in accrued expenses and other current liabilities nil The estimated amount of the loss contingency related to the guarantee was immaterial as of December 31, 2014 and 2015. The Company paid US 78,931 to discharge its guarantee obligations, which represented cumulative default of repayments by students as of December 31, 2013. All the third-party lenders were repaid and the Company's guarantee was released by March 15, 2015. Under the Student Loan Program, upon the receipt of cash from third party individual lenders, Mr. Han remitted US$8,672,904 to the Company on behalf of students for the payment of the students' tuition fees during the year ended December 31, 2013. The Company has stopped providing guarantees for any new student loans arranged by Chuanbang since April 2013. (b) Under the Student Loan Program, the Company allocates the total consideration between the fair value of the tuition service and the loan guarantee. Subsequent to the initial recognition, the loan guarantee liability is recognized as guarantee fee revenue over the term of the guarantee on a straight-line basis. US$90,490, US$18,188 and nil was recognized as guarantee fee revenue and included in other revenues for the years ended December 31, 2013, 2014 and 2015 respectively (c) Under the Student Loan Program, the Company is not required to service the loans indirectly obtained by the students from the third party individual lenders. However, certain students remitted payments to the Company directly instead to Mr. Han. During the year ended December 31, 2013, the Company received cash repayments from students in the amount of US$141,329. The amount received by the Company on behalf of Mr. Han is recorded in amounts due to Mr. Han. The Company repaid US$232,879 to Mr. Han during the year ended December 31, 2013 (d) Represents advance for prepayment of services received from Chuanbang. During the year ended December 31, 2013, the Company received advances in the amount of US$153,386 from Chuanbang. The Company repaid advances of US$153,386 during the year ended December 31, 2013, as the services were no longer required (e) Pursuant to an agreement between Chuanbang and the Company, beginning August 2013, Chuanbang provides cash collection service on the Company's accounts receivable. The fee for the service is calculated based on 6%~12% of the amount collected. Employees of Chuanbang include former employees of the Company who worked in the credit evaluation department. Chuanbang also provides similar cash collection service to financial institutions in the PRC. The cash collection service fee was US$108,068 and US$329,767 for the years ended December 31, 2014 and 2015, respectively. The amount due to Chuanbang as of December 31, 2014 was nil. (f) In September 2015, Precise, which is owned by an executive of Kohlberg Kravis Roberts & Co. L.P (“KKR”), a shareholder of the Company, provided cash advances in the amount of US$230,000 to the Company in order to fund its share repurchase plan. The Company has fully repaid the advances in October 2015

ORDINARY SHARES AND STATUTORY R

ORDINARY SHARES AND STATUTORY RESERVE	12 Months Ended
	Dec. 31, 2015
ORDINARY SHARES AND STATUTORY RESERVE [Abstract]
ORDINARY SHARES AND STATUTORY RESERVE	11 ORDINARY SHARES AND STATUTORY RESERVE (a) Ordinary shares On October 8, 2003, Tarena International was established with authorized share capital of US$ 150,000 90,000,000 0.001 60,000,000 0.001 On December 16, 2008, the Board of Directors of Tarena International approved a 10 9,000,000 1,358,000 90,000,000 13,580,000 6,000,000 1,589,125 60,000,000 15,891,250 On April 9, 2013, IDG Technology Venture Investments, LP (“IDG”), the Series A convertible redeemable preferred shareholder, entered into a series of agreements with Mr. Han, Connion Capital Ltd. (“Connion”), a company incorporated in the Cayman Islands with limited liability and wholly owned by Mr. Han, Techedu Limited, a company incorporated in the British Virgin Islands (“BVI”) with limited liability and wholly owned by Mr. Han, and GF Tarena Limited, a third party company incorporated with limited liability under the law of the BVI, pursuant to which IDG sold 1,146,059 229,212 5 1 4.3628 916,848 4 4.3628 1,146,059 229,212 5 19 30 On February 27, 2014, the Board of Directors of Tarena International approved the fifth amendment of the Memorandum and Articles of Association (the “Amended M&A”), pursuant to which the authorized share capital was amended to 1,000,000,000 0.001 860,000,000 40,000,000 100,000,000 In the Amended M&A, the Board of Directors of Tarena International approved that the Company to adopt a dual class ordinary share structure immediately upon the completion of the IPO. Upon the completion of the IPO, the Group's ordinary shares were divided into Class A ordinary shares and Class B ordinary shares. All of its issued and outstanding ordinary share prior to this offering were re-designated as Class B ordinary shares, all of its issued and outstanding preferred shares were automatically re-designated or converted into Class B ordinary shares on a one-for-one basis immediately upon the completion of the IPO and all of the issued and outstanding options, non-vested shares and non-vested share units granted by the Company pursuant to the 2008 Share Plan and the 2014 Share Incentive Plan were re-designated as options in Class A shares, non-vested Class A ordinary shares, non-vested Class A ordinary share units.. In April 2014, in connection with its IPO, Tarena International issued 11,500,000 Class A ordinary shares with par value of US$ 0.001 9.00 4,031,356 Concurrently upon the completion of the Company's IPO, the Company issued 1,500,000 Class A ordinary shares with par value of US$0.001 to New Oriental Education & Technology Group Inc., in a private placement at a price of US$ 9.00 Upon completion of the IPO on April 3, 2014, the Company had 50,657,389 16,800,000 33,857,389 From April 4, 2014 to December 31, 2014, a total of 8,924,365 1,788,393 From January 1, 2015 to December 31, 2015, a total of 18,158,128 3,043,652 As of December 31, 2015, 860,000,000 40,000,000 44,914,538 43,988,425 have been issued and outstanding, respectively, 10,574,896 shares have been issued and outstanding. (b) Treasury shares On August 20, 2015, the board of directors of the Company authorized a share repurchase plan under which the Company may repurchase up to US$ 20 926,113 7.7 (c) Statutory reserves Under PRC rules and regulations, Tarena International's PRC subsidiaries, consolidated VIEs, and the subsidiaries of the VIEs (the “PRC Entities”) are required to appropriate 10% of their net profit, as determined in accordance with PRC accounting rules and regulations, to a statutory surplus reserve until the reserve balance reaches 50% of their registered capital. In addition, private schools (held by the PRC Entities) which require reasonable returns are required to appropriate 25% of their net profit, as determined in accordance with PRC accounting rules and regulations, to a statutory development fund, whereas in the case of private schools which do not require reasonable return, 25% of the annual increase of their net assets. The appropriation to these statutory reserves must be made before distribution of dividends to Tarena International can be made. For the years ended December 31, 2013, 2014 and 2015, the PRC Entities made appropriations to the statutory reserves of US$ 1,972,313 2,572,599 5,264,194 3,674,841 6,247,440 11,511,634 (d) Reclassification between additional paid-in capital and retained earnings On August 19, 2014, the Board of Directors approved the Company to undertake a reclassification of the balances between additional paid-in capital and retained earnings of US$85,568,016. The reclassification was due to the accretion of convertible redeemable preferred shares, of which US$85,568,016 were charged against the balance in accumulated deficit in the absence of additional paid-in capital.

PREFERRED SHARES

PREFERRED SHARES	12 Months Ended
	Dec. 31, 2015
PREFERRED SHARES [Abstract]
PREFERRED SHARES	12 PREFERRED SHARES Series A convertible redeemable preferred shares On January 16, 2004, pursuant to the Series A convertible redeemable preferred shares purchase agreements (“Series A Purchase Agreement”), Tarena International issued 8,571,430 500,000 0.05833 The Company determined that there was no embedded beneficial conversion feature attributable to the Series A convertible redeemable preferred shares at the commitment date since the initial conversion price of the Series A convertible redeemable preferred shares was greater than the estimated fair value of the Company's ordinary shares as of January 16, 2004. The estimated fair value of the underlying ordinary shares on January 16, 2004 was determined by management based on a retrospective valuation with the assistance of American Appraisal China Limited (“American Appraisal”), an independent valuation firm, using an income approach which requires the estimation of future cash flows and the application of an appropriate discount rate with reference to comparable listed companies engaged in a similar industry to convert such future cash flows to a single present value. The significant terms of Series A convertible redeemable preferred shares are as follows: (i) Conversion The holders of Series A convertible redeemable preferred shares have the right to convert all or any portion of their holdings into ordinary shares at a rate of one-for-one at any time, subject to a contingent conversion price adjustment if there are additional ordinary shares issued or deemed to be issued, as defined in Tarena International's Memorandum and Articles of Association, at a price lower than the Series A Original Issuance Price. In addition, each Series A Preferred Share is automatically converted into ordinary shares upon the consummation of a Qualified Public Offering, as defined in the Series A Purchase Agreement. The contingent conversion price adjustment may provide the holders of the Series A convertible redeemable preferred shares with a beneficial conversion feature. However, any such beneficial conversion feature relating to the conversion price adjustment, if any, is recognized when the contingency is resolved. (ii) Voting The holders of Series A convertible redeemable preferred shares have voting rights equivalent to the ordinary shareholders on an “if-converted” basis. (iii) Dividends Any dividend declared and paid on ordinary shares shall be also declared and paid in respect of the Series A convertible redeemable preferred shares as if all such Series A convertible redeemable preferred shares has been converted to ordinary shares. (iv) Liquidation preference The liquidation preference of the holders of Series A convertible redeemable preferred shares as of December 31, 2013 is as follows: In the event of any liquidation, dissolution, or winding up of the Company, the proceeds shall be distributed according to the following sequence: (i) first to the holders of the Series C convertible redeemable preferred shares at 150% of the Series C Original Issuance Price, plus declared but unpaid dividends on each share of Series C convertible redeemable preferred shares; (ii) second to the holders of Series B convertible redeemable preferred shares at 150% of the Series B Original Issuance Price, plus declared but unpaid dividends on each share of Series B convertible redeemable preferred shares, (iii) third to the holders of Series A convertible redeemable preferred shares at 100% of the Series A Original Issuance Price, plus declared but unpaid dividends on each share of Series A convertible redeemable preferred shares. The remaining assets of the Company, if any, shall be distributed pro rata to the holders of Series C convertible redeemable preferred shares, Series B convertible redeemable preferred shares, Series A convertible redeemable preferred shares and ordinary shares on an “if-converted” basis. From the date of September 25, 2008 to August 11, 2011 (the date of the issuance of Series C convertible redeemable preferred shares), the liquidation preference of the holders of Series A convertible redeemable preferred shares was as follows: In the event of any liquidation, dissolution, or winding up of the Company, the proceeds shall be distributed according to the following sequence: (i) first to the holders of the Series B convertible redeemable preferred shares at 150% of the Series B Original Issuance Price, plus declared but unpaid dividends on each share of Series B convertible redeemable preferred shares; (ii) second to the holders of Series A convertible redeemable preferred shares at 100% of the Series A Original Issuance Price, plus declared but unpaid dividends on each share of Series A convertible redeemable preferred shares. The remaining assets of the Company, if any, shall be distributed pro rata to the holders of Series B convertible redeemable preferred shares, Series A convertible redeemable preferred shares and ordinary shares on an “if-converted” basis. From the date of its issuance (January 16, 2004) to September 25, 2008 (the date of the issuance of Series B convertible redeemable preferred shares), the liquidation preference of the holders of Series A convertible redeemable preferred shares was as follows: In the event of any liquidation, dissolution, or winding up of the Company, the holders of the outstanding Series A convertible redeemable preferred shares shall be entitled to receive, prior and in preference to any distribution of any of the assets of Tarena International to the holders of the ordinary shares by reason of their ownership of such shares, an amount equal to the Series A Original Issuance Price plus dividends declared but unpaid on each share of Series A convertible redeemable preferred shares. The remaining assets of the Company, if any, shall be distributed pro rata to the holders of ordinary shares and Series A convertible redeemable preferred shares then outstanding, based on the number of ordinary shares then held by each shareholder on an “if-converted” basis. (v) Drag-along rights Holders of a majority of the Series A convertible redeemable preferred shares have a drag-along right whereby they can require the ordinary shareholders to approve a third-party offer to directly or indirectly purchase all, or substantial all, of the equity interests or assets of the Company, provided that the transaction shall occur on or after the fifth anniversary of the closing of the issuance of the Series A convertible redeemable preferred shares or the transaction shall be at a price per share of not less than US$0.5833 per share (being retroactively adjusted to reflect the effect of the share split). Triggering of this drag-along right results in a deemed liquidation of the Company at the option of a majority of the holders of Series A convertible redeemable preferred shares with a required distribution of the transaction proceeds in accordance with the Company's Memorandum and Articles of Association. Consequently, the Series A convertible redeemable preferred shares are classified outside of permanent equity. Series B convertible redeemable preferred shares On September 25, 2008, pursuant to Series B convertible redeemable preferred shares purchase agreement, Tarena International issued 5,630,630 5 0.888 1.5 1,689,190 The Company determined that there was no embedded beneficial conversion feature attributable to the Series B convertible redeemable preferred shares at the commitment date since the initial conversion price of the Series B convertible redeemable preferred shares was greater than the estimated fair value of the Company's ordinary shares as of September 25, 2008. The estimated fair value of the underlying ordinary shares on September 25, 2008 was determined by management based on a retrospective valuation with the assistance of American Appraisal, using an income approach which requires the estimation of future cash flows and the application of an appropriate discount rate with reference to comparable listed companies engaged in a similar industry to convert such future cash flows to a single present value. The significant terms of Series B convertible redeemable preferred shares are as follows: (i) Conversion The holders of Series B convertible redeemable preferred shares have the right to convert all or any portion of their holdings into ordinary shares at a rate of one-for-one at any time, subject to a contingent conversion price adjustment if there are additional ordinary shares issued or deemed to be issued, as defined in Tarena International's Memorandum and Articles of Association, at a price lower than the Series B Original Issuance Price. In addition, each Series B convertible redeemable preferred share is automatically converted into ordinary shares upon the written consent of the holders of more than 45% of the then outstanding Series B convertible redeemable preferred shares and the holders of more than 45% of the then outstanding Series A convertible redeemable preferred shares or the consummation of a Qualified Public Offering, as defined in the Series B convertible redeemable preferred shares purchase agreement. (ii) Voting The holders of Series B convertible redeemable preferred shares have voting rights equivalent to the ordinary shareholders on an “if-converted” basis. (iii) Dividends Any dividend declared and paid on ordinary shares shall be also declared and paid in respect of the Series B convertible redeemable preferred shares as if all such Series B convertible redeemable preferred shares have been converted to ordinary shares. (iv) Liquidation preference The liquidation preference of the holders of Series B convertible redeemable preferred shares as of December 31, 2013 is as follows: In the event of any liquidation, dissolution, or winding up of the Company, the proceeds shall be distributed according to the following sequence: (i) first to the holders of the Series C convertible redeemable preferred shares at 150% of the Series C Original Issuance Price, plus declared but unpaid dividends on each share of Series C convertible redeemable preferred shares; (ii) second to the holders of Series B convertible redeemable preferred shares at 150% of the Series B Original Issuance Price, plus declared but unpaid dividends on each share of Series B convertible redeemable preferred shares, (iii) third to the holders of Series A convertible redeemable preferred shares at 100% of the Series A Original Issuance Price, plus declared but unpaid dividends on each share of Series A convertible redeemable preferred shares. The remaining assets of the Company, if any, shall be distributed pro rata to the holders of Series C convertible redeemable preferred shares, Series B convertible redeemable preferred shares, Series A convertible redeemable preferred shares and ordinary shares on an “if-converted” basis. From the date of September 25, 2008 to August 11, 2011 (the date of the issuance of Series C convertible redeemable preferred shares), the liquidation preference of the holders of Series B convertible redeemable preferred shares was as follows: In the event of any liquidation, dissolution, or winding up of the Company, the proceeds shall be distributed according to the following sequence: (i) first to the holders of the Series B convertible redeemable preferred shares at 150% of the Series B Original Issuance Price, plus declared but unpaid dividends on each share of Series B convertible redeemable preferred shares; (ii) second to the holders of Series A convertible redeemable preferred shares at 100% of the Series A Original Issuance Price, plus declared but unpaid dividends on each share of Series A convertible redeemable preferred shares. The remaining assets of the Company, if any, shall be distributed pro rata to the holders of Series B convertible redeemable preferred shares, Series A convertible redeemable preferred shares and ordinary shares on an “if-converted” basis. (v) Redemption If a Qualified Initial Public Offering or a Trade Sale, as defined in the Series B convertible redeemable preferred shares purchase agreement, did not occur by December 31, 2012 (the “Redemption Date”), the holders of Series B convertible redeemable preferred shares had the right to request for redemption any portion of the Series B convertible redeemable preferred shares they held at a price equal to the sum of: • an amount equal to 150% of Series B Original Issuance Price; plus, • an amount equal to all declared but unpaid dividends on each share of Series B convertible redeemable preferred shares; plus, • 10% compound interest per annum on 150% of Series B Original Issuance Price for each Series B convertible redeemable preferred share from the date of issuance to the earliest redemption date of the security. On August 11, 2011, in connection with the issuance of Series C convertible redeemable preferred shares, the Company and holders of Series B convertible redeemable preferred shares agreed to defer the Redemption Date until June 30, 2014. Series C convertible redeemable preferred shares On August 11, 2011, pursuant to the Series C convertible redeemable preferred shares purchase agreement (“Series C Purchase Agreement”), Tarena International issued 10,914,852 19,974,179 1.83 218,376 The Company determined that there was no embedded beneficial conversion feature attributable to the Series C convertible redeemable preferred shares at the commitment date since the initial conversion price of the Series C convertible redeemable preferred shares was greater than the estimated fair value of the Company's ordinary shares as of August 11, 2011. The estimated fair value of the underlying ordinary shares on August 11, 2011 was determined by management based on a retrospective valuation with the assistance of American Appraisal, a third party valuation firm, using an income approach which requires the estimation of future cash flows and the application of an appropriate discount rate with reference to comparable listed companies engaged in a similar industry to convert such future cash flows to a single present value. The significant terms of Series C convertible redeemable preferred shares are as follows: (i) Conversion The holders of Series C convertible redeemable preferred shares have the right to convert all or any portion of their holdings into ordinary shares at a rate of one-for-one at any time, subject to a contingent conversion price adjustment if there are additional ordinary shares issued or deemed to be issued, as defined in Tarena International's Memorandum and Articles of Association, at a price lower than the Series C Original Issuance Price. In addition, each Series C Preferred Share is automatically converted into ordinary shares upon the closing of a Qualified Public Offering, as defined in the Memorandum and Articles of Association or the written consent of 67% of the holders of the Series C convertible redeemable preferred shares as well as the written consent of the holders of more than 45% of the then outstanding Series B convertible redeemable preferred shares and the written consent of the holders of more than 45% of the then outstanding Series A convertible redeemable preferred shares for conversion. The contingent conversion price adjustments may provide the holders of the Series C convertible redeemable preferred shares with a beneficial conversion feature. However, any such beneficial conversion feature relating to the conversion price adjustment, is recognized when the contingency is resolved. (ii) Voting The holders of Series C convertible redeemable preferred shares have voting rights equivalent to the ordinary shareholders on an “if-converted” basis. (iii) Dividends The board of directors of Tarena International may approve the payment of dividends at their discretion to the holders of Series C convertible redeemable preferred shares. Any dividend declared and paid on ordinary shares shall be also declared and paid in respect of the Series C convertible redeemable preferred shares as if all such Series C convertible redeemable preferred shares have been converted to ordinary shares. (iv) Liquidation preference The liquidation preference of the holders of Series C convertible redeemable preferred shares is as follows: In the event of liquidation, dissolution, or winding up of the Company, the proceeds shall be distributed according to the following sequence: (i) first to the holders of the Series C convertible redeemable preferred shares at 150% of the Series C Original Issuance Price, plus declared but unpaid dividends on each share of Series C convertible redeemable preferred shares; (ii) second to the holders of Series B convertible redeemable preferred shares at 150% of the Series B Original Issuance Price, plus declared but unpaid dividends on each share of Series B convertible redeemable preferred shares, (iii) third to the holders of Series A convertible redeemable preferred shares at 100% of the Series A Original Issuance Price, plus declared but unpaid dividends on each share of Series A convertible redeemable preferred shares. The remaining assets of the Company, if any, shall be distributed pro rata to the holders of Series C convertible redeemable preferred shares, Series B convertible redeemable preferred shares, Series A convertible redeemable preferred shares and ordinary shares on an “if-converted” basis. (v) Redemption If a Qualified Initial Public Offering or a Trade Sale, as defined in the Series C convertible redeemable preferred shares purchase agreement, does not occur by June 30, 2014 (the “Redemption Date”), the holders of the Series C convertible redeemable preferred shares have the right to request for redemption for all or a portion of the Series C convertible redeemable preferred shares they hold at a price equal to the greater of (i) an amount equal to 137.50% of the Series C Original Issuance Price, plus declared but unpaid dividends on each share of Series C convertible redeemable preferred shares; or (ii) the fair market value of the Series C convertible redeemable preferred shares as of the most recent year end, as determined by an independent appraiser mutually agreeable to the Company and the holder of the Series C convertible redeemable preferred shares. As of December 31, 2013, the Company concluded that it was probable that the Series B and Series C convertible redeemable preferred shares will become redeemable. The Company has elected to accrete changes in the redemption value over the period from the date of issuance to the earliest redemption date using the interest method. The total accretion of Series B convertible redeemable preferred shares of US$ 2,072,284 576,431 42,287,776 nil All the Series A, Series B and Series C convertible redeemable preferred shares were automatically converted into Class B ordinary shares upon completion of the Company's IPO on April 3, 2014. As a result, 25,430,831 111,929,780 25,431

SHARE BASED COMPENSATION

SHARE BASED COMPENSATION	12 Months Ended
	Dec. 31, 2015
SHARE BASED COMPENSATION [Abstract]
SHARE BASED COMPENSATION	13 SHARE BASED COMPENSATION Share incentive plans On September 22, 2008, Tarena International adopted the 2008 Share Plan (the “2008 Plan”), pursuant to which Tarena International is authorized to issue share options and other share-based awards to key employees, directors and consultants of the Company to purchase up to 6,002,020 8,184,990 On February 1, 2014, Tarena International adopted the 2014 Share Plan (the “2014 Plan”), pursuant to which Tarena International was authorized to issue options, non-vested shares and non-vested share units to qualified employees, directors and consultants of the Company. The maximum aggregate number of shares which may be issued pursuant to all awards under the 2014 Plan, or the Award Pool, is 1,833,696 , Share options On January 1, 2011 and September 26, 2011, the board of directors of Tarena International approved the grant of options to purchase 124,000 1,533,020 five ten 0.63 0.83 On January 1, 2013, the board of directors of Tarena International approved the grant of options to certain employees to purchase 2,029,386 four ten On September 16, 2013, the board of directors of Tarena International approved the grant of options to an employee to purchase 30,000 25 75 four ten On September 16, 2013, the board of directors of Tarena International approved the grant of options to an officer to purchase 458,424 25 75 four ten 3.75 5.69 On February 20, 2014, the board of the directors of Tarena International approved the grant of options to certain officers and employees to purchase 1,805,784 four ten 8.60 During the year ended December 31, 2015, the board of the directors of Tarena International approved the grant of options to certain officers and employees to purchase 615,624 0.89 4.36 1 4 ten A summary of share options activity for the years ended December 31, 2013, 2014 and 2015 is as follows: Number of Weighted Weighted Aggregate Outstanding at December 31, 2012 5,639,020 0.37 Granted 2,517,810 1.83 Exercised — — Forfeited (22,000 ) 1.83 Expired — — Outstanding at December 31, 2013 8,134,830 0.82 Granted 1,805,784 3.05 Exercised (1,786,449 ) 0.14 Forfeited (115,215 ) 2.91 Expired — — Outstanding at December 31, 2014 8,038,950 1.44 6.19 77,657,938 Granted 615,624 3.38 Exercised (3,015,872 ) 1.20 Forfeited (56,926 ) 3.33 Expired — — Outstanding at December 31, 2015 5,581,776 1.77 5.68 48,411,629 Vested and expected to vest as of December 31, 2015 4,922,651 1.63 5.39 43,387,240 Exercisable as of December 31, 2015 2,863,674 0.92 3.63 27,271,499 On June 16, 2015, Mr. Han exercised 2,439,014 2,439,014 2,783,957 The Company calculated the fair value of the share options on the grant date using the Binomial option-pricing valuation model. The assumptions used in the valuation model are summarized in the following table. The total intrinsic value of options exercised during the years ended December 31, 2014 and 2015 were US$ 25,047,974 37,874,734 Year Ended December 31, 2013 2014 2015 US$ US$ US$ Expected volatility 52 % 51.7 % 62.3 70.9 % Expected dividends yield 0 % 0 % 0 % Exercise multiple 2.2 2.2 2.0 Risk-free interest rate per annum 2.27 3.38 % 3.81 % 2.68 2.99 % Estimated fair value of underlying ordinary shares (per share) US$ 3.75 5.69 US$ 8.60 US$ 9.28 12.85 Because the Company's ordinary shares did not have a sufficient The estimated fair value of the underlying ordinary shares on each date of grant prior to September 2013, was determined by management based on a retrospective valuation conducted by American Appraisal. The estimated fair values of the underlying ordinary shares on September 16, 2013 and February 20, 2014 were determined by management based on a contemporaneous valuation conducted by American Appraisal. The Company first determined its enterprise value by using income approach, which required the estimation of future cash flows, and the application of an appropriate discount rate with reference to comparable listed companies engaged in the similar industry to convert such future cash flows to a single present value, and then allocated the enterprise value between the ordinary shares and preferred shares. The fair values of the underlying ordinary shares on each date of grant after April 2014, were the closing prices of the Company's Class A ordinary shares traded in the Stock Exchange. No income tax benefit was recognized in the consolidated statements of comprehensive income as the share-based compensation expense was not tax deductible. The fair values of the options granted for the years ended December 31, 2013, 2014 and 2015 are as follows: Year Ended December 31, 2013 2014 2015 US$ US$ US$ Weighted average grant date fair value of option per share 2.13 6.35 9.16 Aggregate grant date fair value of options 5,372,463 11,467,907 5,640,789 As of December 31, 2015, there was approximately US$ 9,465,571 1.89 Non-vested shares On April 3, 2014, the board of directors of Tarena International approved the grant of two batches of non-vested shares to three independent directors. The number of the first batch of non-vested shares is equal to 27,780 250,000 9 25,000 250,000 10 On November 11, 2014, the board of directors of Tarena International approved the grant of 1,944 One hundred A summary of the non-vested shares activity under the 2014 Share Plan is summarized as follows: Number of Non- Weighted Average US$ Outstanding as of December 31, 2013 - - Granted 29,724 9.38 Vested (1,944 ) 13.95 Forfeited - - Outstanding as of December 31, 2014 27,780 9.06 Granted 25,000 9.63 Vested (27,780 ) 9.06 Forfeited — — Outstanding as of December 31, 2015 25,000 9.63 As of December 31, 2015, there was approximately US$ 39,690 0.25 US$ 27,120 251,687 , respectively.

EARNINGS (LOSS) PER SHARE

EARNINGS (LOSS) PER SHARE	12 Months Ended
	Dec. 31, 2015
EARNINGS (LOSS) PER SHARE [Abstract]
EARNINGS (LOSS) PER SHARE	14 EARNINGS (LOSS) PER SHARE Basic and diluted earnings (loss) per share is calculated as follows: Year Ended December 31, 2013 2014 2015 US$ US$ US$ Numerator: Net income (loss) attributable to Class A and Class B ordinary shareholders (30,313,029 ) 24,114,817 28,709,010 Less: Earnings allocated to participating Series A convertible redeemable preferred shares — (918,266 ) — Earnings allocated to participating Series B convertible redeemable preferred shares — (934,046 ) — Earnings allocated to participating Series C convertible redeemable preferred shares — (1,392,790 ) — Net income (loss) for basic and diluted earnings (loss) per share (30,313,029 ) 20,869,715 28,709,010 Denominator: Denominator for basic earnings per share: Weighted average number of Class A and Class B ordinary shares outstanding 10,930,412 41,223,389 53,767,810 Dilutive effect of outstanding share options — 6,546,743 4,983,046 Denominator for diluted earnings (loss) per share 10,930,412 47,770,132 58,750,856 Basic earnings (loss) per Class A and Class B ordinary share (2.77 ) 0.51 0.53 Diluted earnings (loss) per Class A and Class B ordinary share (2.77 ) 0.44 0.49 The following table summarizes potential ordinary shares outstanding excluded from the calculation of diluted earnings per Class A and Class B ordinary share for the years ended December 31, 2013, 2014 and 2015, because their effect is anti-dilutive: Year Ended December 31, 2013 2014 2015 Shares issuable upon exercise of share options 8,134,830 — — Shares issuable upon conversion of preferred shares 25,430,831 — — The Company uses the two-class method to calculate basic and diluted earnings per Class A and Class B ordinary share. Under the two-class method, when calculating the basic and dilutive earnings per Class A and Class B ordinary share, net income attributable to Class A and Class B ordinary shareholders is adjusted to reflect the net income which is allocated to preferred shares.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2015
COMMITMENTS AND CONTINGENCIES [Abstract]
COMMITMENTS AND CONTINGENCIES	15 COMMITMENTS AND CONTINGENCIES (a) Operating lease commitments Future minimum lease payments under non-cancelable operating lease agreements as of December 31, 2015 were as follows. The Company's leases do not contain any contingent rent payment terms. US$ Year ending December 31, 2016 14,828,199 2017 13,603,574 2018 9,070,769 2019 6,367,021 2020 4,217,222 2021 and thereafter 7,974,602 Total 56,061,387 Gross rent expenses incurred under operating leases were US$ 9,684,871 12,615,613 17,504,333 114,361 230,503 61,403

PARENT ONLY FINANCIAL INFORMATI

PARENT ONLY FINANCIAL INFORMATION	12 Months Ended
	Dec. 31, 2015
PARENT ONLY FINANCIAL INFORMATION [Abstract]
PARENT ONLY FINANCIAL INFORMATION	16 PARENT ONLY FINANCIAL INFORMATION The following presents condensed parent company financial information of Tarena International. Condensed Balance Sheets December 31, 2014 2015 US$ US$ ASSETS Current assets: Cash 1,296,102 966,276 Time deposits 92,182,582 61,196,856 Restricted time deposits — 23,099,668 Prepaid expenses and other current assets 2,256,709 1,669,839 Total current assets 95,735,393 86,932,639 Investments and loans to subsidiaries 88,854,260 121,082,908 Total assets 184,589,653 208,015,547 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Accrued expenses and other current liabilities 449,351 1,004,410 Other non-current liabilities 1,253,070 867,510 Total liabilities 1,702,421 1,871,920 Commitments and contingencies — — Shareholders' equity: Class A ordinary shares (US$ 0.001 860,000,000 23,712,758 44,914,538 23,712,758 43,988,425 23,712 44,914 Class B ordinary shares (US$ 0.001 40,000,000 28,733,024 10,574,896 28,733 10,575 Treasury shares ( nil 926,113 — (7,738,834 Additional paid-in capital 135,886,427 144,776,619 Accumulated other comprehensive income (loss) 1,701,598 (4,905,419) Retained earnings 45,246,762 73,955,772 Total shareholders' equity 182,887,232 206,143,627 Total liabilities and shareholders' equity 184,589,653 208,015,547 Condensed Statements of Comprehensive Income Year Ended December 31, 2013 2014 2015 US$ US$ US$ General and administrative expenses (57,172 ) (170,440 ) (681,129 ) Operating loss (57,172 ) (170,440 ) (681,129 ) Equity in income of subsidiaries 14,079,492 21,103,354 31,303,290 Foreign currency exchange gains (losses) — 1,180,466 (5,126,911) Interest income 24,711 2,288,698 2,828,200 Other income — 289,170 385,560 Income before income taxes 14,047,031 24,691,248 28,709,010 Income tax expense — — — Net income 14,047,031 24,691,248 28,709,010 Other comprehensive income Foreign currency translation adjustment, net of nil income tax 1,150,824 66,678 (6,607,017) Comprehensive income 15,197,855 24,757,926 22,101,993 Condensed Statements of Cash Flows Year Ended December 31, 2013 2014 2015 US$ US$ US$ Operating activities: Net cash provided by (used in) operating activities (3,570 ) 3,226,599 1,381,505 Investing activities: Purchase of time deposits — (92,682,582 ) (94,501,933 ) Proceeds from maturity of time deposits — 500,000 96,923,091 Investments made to subsidiaries — (17,000,000 ) — Net cash provided by (used in) investing activities — (109,182,582 ) 2,421,158 Financing activities: Payment of IPO costs (76,719 ) (2,804,600 ) — Issuance of Class A ordinary shares upon the IPO — 96,254,995 — Issuance of Class A ordinary shares in private placement concurrent with the IPO — 13,500,000 — Issuance of Class A ordinary shares in connection with exercise of share options — 248,812 3,606,345 Advances from a related party — — 230,000 Repayment of advances from a related party — — (230,000) Repurchase of treasury shares — — (7,738,834 Net cash provided by (used in) financing activities (76,719 ) 107,199,207 (4,132,489) Net increase (decrease) in cash (80,289 ) 1,243,224 (329,826) Cash at beginning of year 133,167 52,878 1,296,102 Cash at end of year 52,878 1,296,102 966,276 Non-cash investing and financing activities: Conversion of Series A convertible redeemable preferred shares to Class B ordinary shares 80,224 419,776 — Conversion of Series B convertible redeemable preferred shares to Class B ordinary shares — 16,324,300 — Conversion of Series C convertible redeemable preferred shares to Class B ordinary shares — 95,211,135 — Accrual of IPO costs 107,866 — —

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2015
SUBSEQUENT EVENTS [Abstract]
SUBSEQUENT EVENTS	17 SUBSEQUENT EVENTS On March 7, 2016, The Board of Directors approved to declare a cash dividend of US$ 0.15 8.6

SUMMARY OF SIGNIFICANT ACCOUN26

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2015
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Principles of consolidation	(a) Principles of consolidation The consolidated financial statements include the financial statements of Tarena International, its wholly-owned subsidiaries, VIEs in which Tarena International is the primary beneficiary and their wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated upon consolidation.
Use of estimates	(b) Use of estimates The preparation of consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the collectability of accounts receivable, the fair values of share-based compensation awards, the realizability of deferred income tax assets, the accruals for tax uncertainties and other contingencies, the recoverability of the carrying amounts of property and equipment and the useful lives of property and equipment. The current economic environment has increased the degree of uncertainty inherent in those estimates and assumptions.
Foreign currency	(c) Foreign currency The accompanying consolidated financial statements have been expressed in U.S. dollar (“USD”), the Company's reporting currency. The functional currency of Tarena International and Tarena Hong Kong Limited (“Tarena HK”) is the USD. The functional currency of Tarena International's PRC subsidiaries, consolidated VIEs, and the subsidiaries of the VIEs is the Renminbi (“RMB”). Transactions denominated in currencies other than the functional currency are translated into the functional currency at the exchange rates prevailing at the date of the transaction. Monetary assets and liabilities denominated in foreign currencies are translated into the functional currency using the applicable exchange rate at the balance sheet date. The resulting exchange differences are recorded in foreign currency exchange gains (losses) in the consolidated statements of comprehensive income. Assets and liabilities of entities with functional currencies other than USD are translated into USD using the exchange rate on the balance sheet date. Revenues and expenses are translated into USD at average rates prevailing during the reporting period. The resulting foreign currency translation adjustment are recorded in accumulated other comprehensive income (loss) within shareholders' equity. Since the RMB is not a fully convertible currency, all foreign exchange transactions involving RMB must take place either through the People's Bank of China (the “PBOC”) or other institutions authorized to buy and sell foreign exchange. The exchange rates adopted for the foreign exchange transactions are the rates of exchange quoted by the PBOC.
Cash, cash equivalents, time deposits and restricted time deposits	(d) Cash, cash equivalents, time deposits and restricted time deposits Cash consist of cash on hand and cash in bank, which are unrestricted as to withdrawal. Cash equivalents consist of interest-bearing certificates of deposit with initial term of no more than three months when purchased. Time deposits, which mature within one year as of the balance sheet date, represent interest-bearing certificates of deposit with an initial term of greater than three months when purchased. Time deposits which mature over one year as of the balance sheet date are included in non-current assets. Time deposits that are pledged as collateral for line of credit with a financial institution in the U.S. with an initial term of greater than three months when purchased are reported as restricted time deposits. Cash, cash equivalents, time deposits and restricted time deposits maintained at banks consist of the following: December 31, 2014 2015 US$ US$ RMB denominated bank deposits with financial institutions in the PRC 58,639,210 96,579,459 US dollar denominated bank deposits with a financial institutions in the PRC 36,216,381 8,112,557 US dollar denominated bank deposits with financial institutions in Hong Kong Special Administrative Region (“HK SAR”) 771,786 99,358 HK dollar denominated bank deposits with a financial institution in HK SAR 7 15,181 RMB denominated bank deposits with a financial institution in HK SAR 412 389 RMB denominated bank deposits with financial institutions in the U.S. - 84,296,524 RMB denominated bank deposits with financial institutions in Singapore 71,178,287 - US dollar denominated bank deposits with financial institutions in the U.S. - 8,501 To limit exposure to credit risk relating to bank deposits, the Company primarily places bank deposits only with large financial institutions in the PRC, HK SAR, Singapore and the U.S. with acceptable credit rating.
Short-term investment	(e) Short-term investment During the years ended December 31, 2013, 2014 and 2015, the Company invested US$ 11,298,158 101,390,291 151,768,220 39,930 757,300 957,373
Accounts receivable	(f) Accounts receivable Accounts receivable primarily represent tuition fees due from students. Accounts receivable which are due over one year as of the balance sheet date are presented as non-current assets. The unearned interest on accounts receivable which are due over one year is reported in the consolidated balance sheets as a direct deduction from the principal amount of accounts receivable. See note 2 (i). The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. Accounts receivable is considered past due based on its contractual terms. In establishing the allowance, management considers historical losses, the students' financial condition, the amount of accounts receivables in dispute, the accounts receivables aging and the students' payment patterns. Accounts receivable which are deemed to be uncollectible are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. There is a time lag between when the Company estimates a portion of or the entire account balances to be uncollectible and when a write off of the account balances is taken. The Company takes a write off of the account balances when the Company can demonstrate all means of collection on the outstanding balances have been exhausted or the balances have been overdue for more than three years.
Property and equipment	(g) Property and equipment Property and equipment are recorded at cost. Depreciation is calculated on the straight-line method over the estimated useful lives of the assets. The estimated useful life of property and equipment is as follows: Furniture 5 Office equipment 3 4 Leasehold improvements Shorter of the lease term or the estimated useful life of the assets Ordinary maintenance and repairs are charged to expenses as incurred, while replacements and betterments are capitalized. When items are retired or otherwise disposed of, income is charged or credited for the difference between net book value of the item disposed and proceeds realized thereon. Property and equipment are reviewed for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. Recoverability of a long-lived asset or asset group to be held and used is measured by a comparison of the carrying amount of an asset or asset group to the estimated undiscounted future cash flows expected to be generated by the asset or asset group. If the carrying value of an asset or asset group exceeds its estimated undiscounted future cash flows, an impairment loss is recognized by the amount that the carrying value exceeds the estimated fair value of the asset or asset group. Fair value is determined through various valuation techniques including discounted cash flow models, quoted market values and third party independent appraisals, as considered necessary. Assets to be disposed are reported at the lower of carrying amount or fair value less costs to sell, and are no longer depreciated. No impairment of long-lived assets was recognized for any of the years presented.
Cost method investments	(h) Cost method investments Investments in entities in which the Company does not have an ability to exercise significant influence over the operating and financial matters of the investees and which do not have readily determinable fair value are accounted for using the cost method, under which the Company carries the investments at cost and recognizes as income for any dividend received from distribution of the investees' earnings. The Company evaluates each cost method investment for impairment on a quarterly basis and recognizes an impairment loss if a decline in value is determined to be other-than-temporary. Such impairment evaluation includes, but not limited to: the current business environment; going concern considerations such as financial condition, the utilization of cash, ability to obtain additional financing to achieve its business plan, recent rounds of financing and comparable valuations.
Revenue recognition	(i) Revenue recognition Revenue is recognized when all of the following conditions are met: persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price is fixed or determinable and collectability is reasonably assured. These criteria as they relate to each of the following major revenue generating activities are described below. Revenue is presented net of business tax and value added taxes (“VAT”) at rates ranging between 3% and 6%, and surcharges. VAT and business tax collected from customers, net of VAT paid for purchases, is recorded as a liability in the consolidated balance sheets until it is paid to the tax authorities. Tuition fees Educational and professional tuition fees are recognized as revenue ratably over the period of the training course, which primarily range from four to five months. The unearned portion of tuition fees is recorded as deferred revenue. Certain qualified students are allowed to pay their tuition fees on installment for a period of time exceeding one year. When tuition services are sold on installment terms that exceeds one year beyond the point in time that revenue is recognized, the receivable, and therefore the revenue is recorded at the present value of the payments. The difference between the present value of the receivable and the nominal or principal value of the tuition fees is recognized as interest income over the contractual repayment period using the effective interest rate method. The interest rate used to determine the present value of total amount receivable is the rate at which the students can obtain financing of a similar nature from other sources at the date of the transaction. Certification service revenue The Company provides certification service to students who complete the training course and enroll for the exams. The Company is responsible for the certification service, including organization, proctoring and grading of exams. All certificates are issued by third parties to the students who pass the exam. The Company acts as the principal in providing this service and recognizes revenue on gross basis because the Company is the primary obligor in the arrangement and is responsible for fulfilling the ordered services by the students. Cash received before the students taking the exam, is recorded as deferred revenue, and subsequently recognized as certification service revenue upon completion of the certification service, which occurs when the certificates are provided to the students.
Cost of revenues	(j) Cost of revenues Cost of revenues consists of payroll and employee benefits, rent expenses of learning centers, depreciation relating to property and equipment used for operating the learning centers, and other operating costs that are directly attributed to the provision of training services.
Advertising costs	(k) Advertising costs Advertising costs are expensed as incurred and included in selling and marketing expenses. Advertising costs were US$ 11,570,458 16,738,921 24,336,415
Operating lease	(l) Operating lease The Company leases premises for learning centers and offices under non-cancellable operating leases. Leases with escalated rent provisions are recognized on a straight-line basis commencing with the beginning of the lease term. There are no capital improvement funding, other lease concessions or contingent rent in the lease agreements. The lease terms of the Company's learning centers range between 1 10 Certain learning centers of the Company sublease a portion of the areas to certain students for their living accommodation. Income from subleases is recognized on a straight-line basis over the term of the lease and recognized as reduction of costs of revenues.
Government grant	(m) Government grant Government grant is recognized when there is reasonable assurance that the Company will comply with the conditions attach to it and the grant will be received. Government grant for the purpose of giving immediate financial support to the Company with no future related costs or obligation is recognized in the Company's consolidated statements of comprehensive income when the grant becomes receivable. Government grants of US$ 1,254,332 1,613,436 939,646
Research and development expense	(n) Research and development expense Research and development costs are expensed as incurred.
Employee benefits	(o) Employee benefits Pursuant to relevant PRC regulations, the Company is required to make contributions to various defined contribution plans organized by municipal and provincial PRC governments. The contributions are made for each PRC employee at rates ranging from 25.5 52.5 5,850,415 8,385,747 11,140,810
Income taxes	(p) Income taxes Income taxes are accounted for under the asset and liability method. Deferred income tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and tax loss and tax credit carry forwards. Deferred income tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the periods in which those temporary differences are expected to be recovered or settled. The effect on deferred income tax assets and liabilities of a change in tax rates or tax laws is recognized in the consolidated statements of comprehensive income in the period the change in tax rates or tax laws is enacted. A valuation allowance is provided to reduce the carrying amount of deferred income tax assets if it is considered more likely than not that some portion or all of the deferred income tax assets will not be realized. The Company recognizes in the consolidated financial statements the impact of a tax position, if that position is more likely than not of being sustained upon examination, based on the technical merits of the position. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company has elected to classify interest and penalties related to an unrecognized tax benefits, if and when required, as part of income tax expense in the consolidated statements of comprehensive income.
Deferred offering costs	(q) Deferred offering costs Deferred offering costs consist principally of legal, printing and registration costs in connection with the IPO. Upon completion of the IPO on April 3, 2014, the deferred offering costs of US$ 615,793
Share based compensation	(r) Share based compensation The Company measures the cost of employee services received in exchange for an award of equity instruments based on the grant-date fair value of the award and recognizes the cost over the period the employee is required to provide service in exchange for the award, which generally is the vesting period. The Company recognizes compensation cost for an award with only service conditions that has a graded vesting schedule on a straight-line basis over the requisite service period for the entire award, net of estimated forfeitures, provided that the cumulative amount of compensation cost recognized at any date at least equals the portion of the grant-date value of such award that is vested at that date. Forfeiture rates are estimated based on historical and future expectations of employee turnover rates.
Commitments and contingencies	(s) Commitments and contingencies In the normal course of business, the Company is subject to loss contingencies, such as legal proceedings and claims arising out of its business, that cover a wide range of matters, including, among others, government investigations, shareholder lawsuits, and non-income tax matters. An accrual for a loss contingency is recognized when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. If a potential material loss contingency is not probable but is reasonably possible, or is probable but cannot be estimated, then the nature of the contingent liability, together with an estimate of the range of possible loss if determinable and material, is disclosed. The allowance for off-balance-sheet credit exposures is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to the guarantee under the Student Loan Program. See note 10. The Company evaluates the current status of the payment and performance risk of the guarantee based on periodic evaluations of the actual defaults, estimated future defaults, current understanding of the students' status and existing economic conditions.
Earnings (loss) per share	(t) Earnings (loss) per share Basic earnings (loss) per Class A and Class B ordinary share is computed by dividing net income (loss) attributable to Tarena International's Class A and Class B ordinary shareholders by the weighted average number of Class A and Class B ordinary shares outstanding during the year using the two-class method. Under the two-class method, net income (loss) attributable to Tarena International's Class A and Class B ordinary shareholders is allocated between Class A and Class B ordinary shares and other participating securities, if any, based on participating rights in undistributed earnings. Tarena International's Series A convertible redeemable preferred shares, Series B convertible redeemable preferred shares and Series C convertible redeemable preferred shares were participating securities since the holders of these securities participated in dividends on the same basis as Class A and Class B ordinary shareholders. These participating securities were not included in the computation of basic loss per Class A and Class B ordinary share in periods when the Company reported net loss, because these participating security holders have no obligation to share in the losses of Tarena International based on the contractual rights and obligations of these participating securities. Diluted earnings (loss) per share is calculated by dividing net income (loss) attributable to Tarena International's Class A
Segment reporting	(u) Segment reporting The Company uses the management approach in determining its operating segments. The management approach considers the internal reporting used by the Company's chief operating decision maker for making decisions about the allocation of resources to and the assessment of the performance of the segments of the Company. Management has determined that the Company has one operating segment, which is the training segment. All of the Company's operations and customers are located in the PRC. Consequently, no geographic information is presented.
Fair value measurements	(v) Fair value measurements The Company applies the provisions of ASC Topic 820, Fair Value Measurements and Disclosures, ASC Topic 820 establishes a fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. ASC Topic 820 establishes three levels of inputs that may be used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to measurements involving significant unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows: • Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. • Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. • Level 3 inputs are unobservable inputs for the asset or liability. The level in the fair value hierarchy within which a fair value measurement in its entirety falls is based on the lowest level input that is significant to the fair value measurement in its entirety. In situations where there is little, if any, market activity for the asset or liability at the measurement date, the fair value measurement reflects management's own judgments about the assumptions that market participants would use in pricing the asset or liability. Those judgments are developed by management based on the best information available in the circumstances. The carrying amounts of cash and cash equivalents, time deposits, restricted time deposits, accounts receivable, housing loans to employees, accounts payable, amount due to a related party, accrued expenses and other current liabilities as of December 31, 2014 and 2015 approximate their fair value because of short maturity of these instruments. The carrying amounts of non-current time deposits as of December 31, 2014 and 2015 approximates their fair value since the interest rates of the time deposits did not differ significantly from the market interest rates for similar types of time deposits. The fair values of time deposits and restricted time deposits as of December 31, 2014 and 2015 are categorized as Level 2 measurement.
Recently issued accounting standards	(w) Recently issued accounting standards The Financial Reporting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers, in May 2014. ASU 2014-09 requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. An entity should also disclose sufficient quantitative and qualitative information to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. In December 2015, the FASB issued ASU No. 2015-14, Revenue from contracts with customers, which deferred the effective date of ASU 2014-09. The new standard is effective for annual reporting periods beginning after December 15, 2017. The Company will implement the provisions of ASU 2014-09 as of January 1, 2018. The Company has not yet determined the impact of the new standard on its current policies for revenue recognition. In 2015, the Company elected to early adopt the ASU 2015-17, Balance Sheet Classification of Deferred Taxes , which requires entities with a classified balance sheet to present all deferred tax assets and liabilities as noncurrent. The Company adopted this new guidance retrospectively. As a result of adoption of this guidance, the Company reclassified current deferred income tax assets in the amount of USD2.1 million to other noncurrent assets as of December 31, 2014. There was no impact on results of operations or cash flows as a result of this guidance. The FASB issued Accounting Standards Codification (“ASC”) Topic 842, Leases , in February 2016. ASC Topic 842 requires a lessee to recognize all leases, including operating leases, on balance sheet via a right-of-use asset and lease liability, unless the lease is a short-term lease (one with an accounting lease term of 12 months or less). All (or a portion of) fixed payments by the lessee to cover lessor costs related to ownership of the underlying assets, or executory costs, that do not represent payments for a good or service will be considered lease payments and reflected in the measurement of lease assets and lease liabilities by lessees. The new standard does not substantially change lessor accounting from current U.S. GAAP. The new standard also requires lessees and lessors to disclose more qualitative and quantitative information about their leases than current U.S. GAAP does. The standard is applied retrospectively, with elective reliefs. The new standard is effective for annual and interim reporting periods beginning after December 15, 2018 for a public business entity. Early adoption is permitted. The Company has not yet determined the impact of the new standard on its current policies for leases.

DESCRIPTION OF BUSINESS, ORGA27

DESCRIPTION OF BUSINESS, ORGANIZATION, BASIS OF PRESENTATION AND SIGNIFICANT CONCENTRATIONS AND RISKS (Tables)	12 Months Ended
	Dec. 31, 2015
DESCRIPTION OF BUSINESS, ORGANIZATION, BASIS OF PRESENTATION AND SIGNIFICANT CONCENTRATIONS AND RISKS [Abstract]
Schedule of Variable Interest Entity Information	December 31, 2014 2015 US$ US$ Cash 243,292 160,614 Prepaid expenses and other current assets 25,166 153 Amounts due from related parties 4,394,839 3,866,683 Total current assets 4,663,297 4,027,450 Property and equipment, net 19,582 2,709 Cost method investments — 2,771,960 Other non-current assets — 40,917 Total assets 4,682,879 6,843,036 Income taxes payable 616,515 575,480 Accrued expenses and other current liabilities 103,231 137,408 Amounts due to related parties, including amounts due to WOFE for accrued service fees 3,486,740 6,053,190 Total current liabilities 4,206,486 6,766,078 Other non-current liabilities 43,664 41,145 Total liabilities 4,250,150 6,807,223 Year Ended December 31, 2013 2014 2015 US$ US$ US$ Net revenues 8,191,886 472,512 28,376 Net loss (1,917,256 ) (2,285,932 ) (387,902 ) Net cash used in operating activities (1,538,619 ) (610,826 ) (353,434 ) Net cash provided by (used in) investing activities (470,805 ) 66,824 (2,890,823 ) Net cash provided by financing activities 1,436,631 671,417 3,172,672 Effect of foreign currency exchange rate changes on cash 25,208 (70,821 ) (11,093 )
Net revenues [Member] | Product concentration [Member]
Concentration Risk [Line Items]
Schedule of Revenue Concentration	Year Ended December 31, 2013 2014 2015 Digital Arts 6.7 % 29.1 % 32.2 % Java 59.3 % 36.7 % 28.8 % Total 66.0 % 65.8 % 61.0 %
Net revenues [Member] | Geographic concentration [Member]
Concentration Risk [Line Items]
Schedule of Revenue Concentration	Year Ended December 31, 2013 2014 2015 Hangzhou 5.3 % 25.5 % 33.0 % Beijing 36.1 % 15.5 % 12.3 % Total 41.4 % 41.0 % 45.3 %

SUMMARY OF SIGNIFICANT ACCOUN28

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2015
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Schedule of Cash, Cash Equivalents, Time Deposits and Restricted Time Deposits	December 31, 2014 2015 US$ US$ RMB denominated bank deposits with financial institutions in the PRC 58,639,210 96,579,459 US dollar denominated bank deposits with a financial institutions in the PRC 36,216,381 8,112,557 US dollar denominated bank deposits with financial institutions in Hong Kong Special Administrative Region (“HK SAR”) 771,786 99,358 HK dollar denominated bank deposits with a financial institution in HK SAR 7 15,181 RMB denominated bank deposits with a financial institution in HK SAR 412 389 RMB denominated bank deposits with financial institutions in the U.S. - 84,296,524 RMB denominated bank deposits with financial institutions in Singapore 71,178,287 - US dollar denominated bank deposits with financial institutions in the U.S. - 8,501

ACCOUNTS RECEIVABLE (Tables)

ACCOUNTS RECEIVABLE (Tables)	12 Months Ended
	Dec. 31, 2015
ACCOUNTS RECEIVABLE [Abstract]
Schedule of Accounts Receivable	December 31, 2014 2015 US$ US$ Accounts receivable: Gross 32,420,858 36,593,434 Unearned interest (1,971,843 ) (2,463,474 ) Total accounts receivable 30,449,015 34,129,960 Less: allowance for doubtful accounts (5,776,525 ) (10,295,762 ) Accounts receivable, net 24,672,490 23,834,198
Classification of Accounts Receivable	December 31, 2014 2015 US$ US$ Accounts receivable, net – current portion 23,184,239 22,637,451 Accounts receivable, net – non-current portion 1,488,251 1,196,747 Total accounts receivable, net 24,672,490 23,834,198
Summary of Allowance for Doubtful Accounts	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Balance at the beginning of the year 1,306,306 2,303,029 5,776,525 Additions charged to bad debt expense 941,065 7,487,174 10,134,357 Write-off of bad debt allowance — (4,035,620 ) (5,073,810 ) Foreign currency translation adjustment 55,658 21,942 (541,310 ) Balance at the end of the year 2,303,029 5,776,525 10,295,762
Schedule of Aging Accounts Receivable	As of December 31, 2014 2015 US$ US$ Aging: – current 11,940,237 16,072,343 – 1-3 months past due 5,058,887 5,698,759 – 4-6 months past due 4,139,377 2,059,362 – 7-12 months past due 6,119,995 2,774,243 – greater than one year past due 3,190,519 7,525,253 Total accounts receivable 30,449,015 34,129,960

PREPAID EXPENSES AND OTHER CU30

PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)	12 Months Ended
	Dec. 31, 2015
PREPAID EXPENSES AND OTHER CURRENT ASSETS [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	December 31, 2014 2015 US$ US$ Prepaid expenses and other current assets: Prepaid rental expenses 2,260,000 2,760,388 Interest receivable from time deposits 2,556,518 1,768,667 Prepaid advertising deposits 175,682 1,690,126 Prepaid advertising expenses 1,751,146 1,538,659 Prepaid value-added tax 715,157 1,105,122 Housing loans made to employees (a) 436,467 352,655 Staff advances (b) 81,903 65,153 Others (c) 753,251 899,041 Total prepaid expenses and other current assets 8,730,124 10,179,811 (a) The Company provided one-year housing loans to the employees to help them finance their purchase of apartments. (b) Staff advances are provided to staff for traveling and related expenses and are expensed when incurred. (c) Others mainly represent other deposits, professional fees and other miscellaneous prepaid expenses.

PROPERTY AND EQUIPMENT, NET (Ta

PROPERTY AND EQUIPMENT, NET (Tables)	12 Months Ended
	Dec. 31, 2015
PROPERTY AND EQUIPMENT, NET [Abstract]
Schedule of Property and Equipment	December 31, 2014 2015 US$ US$ Furniture 934,033 1,618,584 Office equipment 23,583,820 32,552,762 Leasehold improvements 5,525,229 8,181,251 Total property and equipment 30,043,082 42,352,597 Less: accumulated depreciation (16,669,132 ) (22,661,818 ) Property and equipment, net 13,373,950 19,690,779
Schedule of Depreciation Expense	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Cost of revenues 4,001,726 6,200,645 7,797,649 Selling and marketing expenses 278,094 366,819 432,695 General and administrative expenses 347,904 431,246 486,820 Research and development expenses 26,190 79,398 112,821 Total 4,653,914 7,078,108 8,829,985

COST METHOD INVESTMENTS (Tables

COST METHOD INVESTMENTS (Tables)	12 Months Ended
	Dec. 31, 2015
COST METHOD INVESTMENTS [Abstract]
Schedule of cost method investments	December 31, 2014 2015 US$ US$ Sino-German Know-How Education Investment Co., Ltd. (a) — 1,847,973 Juesheng.com (b) — 769,989 Mxsoft.com (c) — 615,991 Other cost method investments (d) — 461,993 Total — 3,695,946 (a) In October 2015, the Company paid RMB 12,000,000 2.86 (b) In November 2015, the Company paid RMB 5,000,000 0.50 (c) In August 2015, the Company paid RMB 4,000,000 5.71 (d) As of December 31, 2015, the Company paid RMB 3,000,000 1.43 0.74 two

ACCRUED EXPENSES AND OTHER CU33

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2015
ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES [Abstract]
Schedule of Accrued Expenses and Other Current Liabilities	December 31, 2014 2015 US$ US$ VAT and other tax payables 1,913,361 2,825,427 Accrued payroll and employee benefits 4,389,540 5,758,853 Others 2,136,509 3,710,193 Total 8,439,410 12,294,473

NET REVENUES (Tables)

NET REVENUES (Tables)	12 Months Ended
	Dec. 31, 2015
NET REVENUES [Abstract]
Schedule of Net Revenues	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Tuition fee 92,927,773 135,932,251 188,641,628 Certification service fee 2,001,705 2,936,647 4,411,095 Others 897,862 467,433 182,310 Business taxes and surcharges (2,993,680 ) (3,132,314 ) (4,045,503 ) Total net revenues 92,833,660 136,204,017 189,189,530

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2015
INCOME TAXES [Abstract]
Schedule of Income before Income Taxes	Year Ended December 31, 2013 2014 2015 US$ US$ US$ PRC 16,533,265 23,827,863 32,246,850 Hong Kong (182,447 ) (319,685 ) (306,499 ) Cayman Islands (32,461 ) 3,587,894 (2,594,280 ) Total income before income taxes 16,318,357 27,096,072 29,346,071
Schedule of Income Tax Expense	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Current income tax expense 3,323,591 3,087,902 4,108,376 Deferred income tax benefit (1,052,265 ) (683,078 ) (3,471,315 ) Total 2,271,326 2,404,824 637,061
Schedule of Income Tax Rate Reconciliation	Year Ended December 31, 2013 2014 2015 PRC statutory income tax rate 25.0 % 25.0 % 25.0 % Increase (decrease) in effective income tax rate resulting from: Cayman and HK entities not subject to income taxes 0.3 % (3.0 )% 2.5 % Research and development bonus deduction (3.3 )% (2.7 )% (3.3 )% Non-deductible selling, general and administrative expenses Share based compensation 1.2 % 3.8 % 4.5 % Other non-deductible selling, general and administrative expenses 0.4 % 0.5 % 0.6 % ANTE preferential tax rate (10.2 )% (1.0 )% 0.1 % Tarena Hangzhou preferential tax rate 1.4 % (0.1 )% 0.7 % Change in valuation allowance (0.9 ) % 6.4 % 3.1 % Tarena Hangzhou tax holiday - (20.0 )% (31.1 )% Deemed profit method differential (0.2 )% (0.1 )% (0.0 )% Others 0.2 % 0.1 % 0.1 % Actual income tax expense 13.9 % 8.9 % 2.2 %
Schedule of Deferred Income Tax Assets	December 31, 2014 2015 US$ US$ Deferred income tax assets: Accounts receivable 2,729,700 5,330,829 Tax loss carry forwards 691,350 1,087,954 Advertising expense 1,151,432 2,104,573 Total deferred income tax assets 4,572,482 8,523,356 Valuation allowance (2,347,093 ) (3,097,761 ) Deferred income tax assets, net 2,225,389 5,425,595
Summary of Valuation Allowance	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Balance at the beginning of the year 731,828 598,117 2,347,093 Additions of valuation allowance 525,061 1,823,101 1,456,539 Reduction of valuation allowance (678,916 ) (78,687 ) (532,478 ) Foreign currency translation adjustment 20,144 4,562 (173,393 ) Balance at the end of the year 598,117 2,347,093 3,097,761
Schedule of Unrecognized Tax Benefits	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Balance at beginning of year 1,700,106 3,077,693 6,033,774 Increase related to current year tax positions 2,843,585 5,768,868 8,198,639 Settlement (1,539,717 ) (2,813,061 ) (5,551,468 ) Foreign currency translation adjustment 73,719 274 (456,918 ) Balance at end of year 3,077,693 6,033,774 8,224,027

RELATED PARTY TRANSACTIONS (Tab

RELATED PARTY TRANSACTIONS (Tables)	12 Months Ended
	Dec. 31, 2015
RELATED PARTY TRANSACTIONS [Abstract]
Schedule of Related Party Transactions	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Transactions with Chuanbang Tuition fees paid under the Student Loan Program (a) 8,672,904 — — Guarantee fee (b) 90,490 18,188 — Amounts received under the Student Loan Program (c) (141,329 ) — — Repayment of amounts received under the Student Loan Program (c) 232,879 — — Advances from Chuanbang (d) (153,386 ) — — Repayment of advances from Chuanbang (d) 153,386 — — Cash collection service fee (e) 64,586 108,068 329,767 Transactions with others Advances from Precise (f) — — (230,000 ) Repayment of advances from Precise (f) — — 230,000

SHARE BASED COMPENSATION (Table

SHARE BASED COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2015
SHARE BASED COMPENSATION [Abstract]
Summary of Stock Option Activity	Number of Weighted Weighted Aggregate Outstanding at December 31, 2012 5,639,020 0.37 Granted 2,517,810 1.83 Exercised — — Forfeited (22,000 ) 1.83 Expired — — Outstanding at December 31, 2013 8,134,830 0.82 Granted 1,805,784 3.05 Exercised (1,786,449 ) 0.14 Forfeited (115,215 ) 2.91 Expired — — Outstanding at December 31, 2014 8,038,950 1.44 6.19 77,657,938 Granted 615,624 3.38 Exercised (3,015,872 ) 1.20 Forfeited (56,926 ) 3.33 Expired — — Outstanding at December 31, 2015 5,581,776 1.77 5.68 48,411,629 Vested and expected to vest as of December 31, 2015 4,922,651 1.63 5.39 43,387,240 Exercisable as of December 31, 2015 2,863,674 0.92 3.63 27,271,499
Summary of Fair Value Assumptions	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Expected volatility 52 % 51.7 % 62.3 70.9 % Expected dividends yield 0 % 0 % 0 % Exercise multiple 2.2 2.2 2.0 Risk-free interest rate per annum 2.27 3.38 % 3.81 % 2.68 2.99 % Estimated fair value of underlying ordinary shares (per share) US$ 3.75 5.69 US$ 8.60 US$ 9.28 12.85
Schedule of Fair Values of the Options Granted	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Weighted average grant date fair value of option per share 2.13 6.35 9.16 Aggregate grant date fair value of options 5,372,463 11,467,907 5,640,789
Summary of Non-vested Shares Activity	Number of Non- Weighted Average US$ Outstanding as of December 31, 2013 - - Granted 29,724 9.38 Vested (1,944 ) 13.95 Forfeited - - Outstanding as of December 31, 2014 27,780 9.06 Granted 25,000 9.63 Vested (27,780 ) 9.06 Forfeited — — Outstanding as of December 31, 2015 25,000 9.63

EARNINGS (LOSS) PER SHARE (Tabl

EARNINGS (LOSS) PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2015
EARNINGS (LOSS) PER SHARE [Abstract]
Schedule of Basic and Diluted Earnings (Loss) per Share	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Numerator: Net income (loss) attributable to Class A and Class B ordinary shareholders (30,313,029 ) 24,114,817 28,709,010 Less: Earnings allocated to participating Series A convertible redeemable preferred shares — (918,266 ) — Earnings allocated to participating Series B convertible redeemable preferred shares — (934,046 ) — Earnings allocated to participating Series C convertible redeemable preferred shares — (1,392,790 ) — Net income (loss) for basic and diluted earnings (loss) per share (30,313,029 ) 20,869,715 28,709,010 Denominator: Denominator for basic earnings per share: Weighted average number of Class A and Class B ordinary shares outstanding 10,930,412 41,223,389 53,767,810 Dilutive effect of outstanding share options — 6,546,743 4,983,046 Denominator for diluted earnings (loss) per share 10,930,412 47,770,132 58,750,856 Basic earnings (loss) per Class A and Class B ordinary share (2.77 ) 0.51 0.53 Diluted earnings (loss) per Class A and Class B ordinary share (2.77 ) 0.44 0.49
Schedule of Anti-Dilutive Shares	Year Ended December 31, 2013 2014 2015 Shares issuable upon exercise of share options 8,134,830 — — Shares issuable upon conversion of preferred shares 25,430,831 — —

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2015
COMMITMENTS AND CONTINGENCIES [Abstract]
Schedule of Future Minimum Lease Payments	US$ Year ending December 31, 2016 14,828,199 2017 13,603,574 2018 9,070,769 2019 6,367,021 2020 4,217,222 2021 and thereafter 7,974,602 Total 56,061,387

PARENT ONLY FINANCIAL INFORMA40

PARENT ONLY FINANCIAL INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2015
PARENT ONLY FINANCIAL INFORMATION [Abstract]
Condensed Balance Sheets	December 31, 2014 2015 US$ US$ ASSETS Current assets: Cash 1,296,102 966,276 Time deposits 92,182,582 61,196,856 Restricted time deposits — 23,099,668 Prepaid expenses and other current assets 2,256,709 1,669,839 Total current assets 95,735,393 86,932,639 Investments and loans to subsidiaries 88,854,260 121,082,908 Total assets 184,589,653 208,015,547 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Accrued expenses and other current liabilities 449,351 1,004,410 Other non-current liabilities 1,253,070 867,510 Total liabilities 1,702,421 1,871,920 Commitments and contingencies — — Shareholders' equity: Class A ordinary shares (US$ 0.001 860,000,000 23,712,758 44,914,538 23,712,758 43,988,425 23,712 44,914 Class B ordinary shares (US$ 0.001 40,000,000 28,733,024 10,574,896 28,733 10,575 Treasury shares ( nil 926,113 — (7,738,834 Additional paid-in capital 135,886,427 144,776,619 Accumulated other comprehensive income (loss) 1,701,598 (4,905,419) Retained earnings 45,246,762 73,955,772 Total shareholders' equity 182,887,232 206,143,627 Total liabilities and shareholders' equity 184,589,653 208,015,547
Condensed Statements of Comprehensive Income	Year Ended December 31, 2013 2014 2015 US$ US$ US$ General and administrative expenses (57,172 ) (170,440 ) (681,129 ) Operating loss (57,172 ) (170,440 ) (681,129 ) Equity in income of subsidiaries 14,079,492 21,103,354 31,303,290 Foreign currency exchange gains (losses) — 1,180,466 (5,126,911) Interest income 24,711 2,288,698 2,828,200 Other income — 289,170 385,560 Income before income taxes 14,047,031 24,691,248 28,709,010 Income tax expense — — — Net income 14,047,031 24,691,248 28,709,010 Other comprehensive income Foreign currency translation adjustment, net of nil income tax 1,150,824 66,678 (6,607,017) Comprehensive income 15,197,855 24,757,926 22,101,993
Condensed Statements of Cash Flows	Year Ended December 31, 2013 2014 2015 US$ US$ US$ Operating activities: Net cash provided by (used in) operating activities (3,570 ) 3,226,599 1,381,505 Investing activities: Purchase of time deposits — (92,682,582 ) (94,501,933 ) Proceeds from maturity of time deposits — 500,000 96,923,091 Investments made to subsidiaries — (17,000,000 ) — Net cash provided by (used in) investing activities — (109,182,582 ) 2,421,158 Financing activities: Payment of IPO costs (76,719 ) (2,804,600 ) — Issuance of Class A ordinary shares upon the IPO — 96,254,995 — Issuance of Class A ordinary shares in private placement concurrent with the IPO — 13,500,000 — Issuance of Class A ordinary shares in connection with exercise of share options — 248,812 3,606,345 Advances from a related party — — 230,000 Repayment of advances from a related party — — (230,000) Repurchase of treasury shares — — (7,738,834 Net cash provided by (used in) financing activities (76,719 ) 107,199,207 (4,132,489) Net increase (decrease) in cash (80,289 ) 1,243,224 (329,826) Cash at beginning of year 133,167 52,878 1,296,102 Cash at end of year 52,878 1,296,102 966,276 Non-cash investing and financing activities: Conversion of Series A convertible redeemable preferred shares to Class B ordinary shares 80,224 419,776 — Conversion of Series B convertible redeemable preferred shares to Class B ordinary shares — 16,324,300 — Conversion of Series C convertible redeemable preferred shares to Class B ordinary shares — 95,211,135 — Accrual of IPO costs 107,866 — —

DESCRIPTION OF BUSINESS, ORGA41

DESCRIPTION OF BUSINESS, ORGANIZATION, BASIS OF PRESENTATION AND SIGNIFICANT CONCENTRATIONS AND RISKS (Organization) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Variable Interest Entity [Line Items]
Prepaid expenses and other current assets	$ 10,179,811	$ 8,730,124
Total current assets	204,342,426	181,409,030
Property and equipment, net	19,690,779	$ 13,373,950
Cost method investments	3,695,946
Other non-current assets	8,178,969	$ 4,369,889
Total assets	254,695,560	217,954,174
Income taxes payable	8,669,015	5,394,036
Accrued expenses and other current liabilities	12,294,473	$ 8,439,410
Amounts due to related parties, including amounts due to WOFE for accrued service fees	135,393
Total current liabilities	47,114,695	$ 33,429,186
Other non-current liabilities	1,437,238	1,637,756
Total liabilities	48,551,933	35,066,942
Net revenues	189,189,530	136,204,017	$ 92,833,660
Net loss	28,709,010	24,691,248	14,047,031
Net cash used in operating activities	55,842,680	28,459,868	29,705,551
Net cash provided by (used in) investing activities	(11,614,868)	(119,458,540)	(19,537,130)
Net cash provided by financing activities	(4,132,489)	106,471,782	(590,881)
Effect of foreign currency exchange rate changes on cash	(3,609,818)	1,047,426	364,495
Investment amount in PRC companies, which are engaged in provision of educational products and services	2,900,000
Tarena Entities [Member]
Variable Interest Entity [Line Items]
Cash	160,614	243,292
Prepaid expenses and other current assets	153	25,166
Amounts due from related parties	3,866,683	4,394,839
Total current assets	4,027,450	4,663,297
Property and equipment, net	2,709	$ 19,582
Cost method investments	2,771,960
Other non-current assets	40,917
Total assets	6,843,036	$ 4,682,879
Income taxes payable	575,480	616,515
Accrued expenses and other current liabilities	137,408	103,231
Amounts due to related parties, including amounts due to WOFE for accrued service fees	6,053,190	3,486,740
Total current liabilities	6,766,078	4,206,486
Other non-current liabilities	41,145	43,664
Total liabilities	6,807,223	4,250,150
Net revenues	28,376	472,512	8,191,886
Net loss	(387,902)	(2,285,932)	(1,917,256)
Net cash used in operating activities	(353,434)	(610,826)	(1,538,619)
Net cash provided by (used in) investing activities	(2,890,823)	66,824	(470,805)
Net cash provided by financing activities	3,172,672	671,417	1,436,631
Effect of foreign currency exchange rate changes on cash	$ (11,093)	$ (70,821)	$ 25,208

DESCRIPTION OF BUSINESS, ORGA42

DESCRIPTION OF BUSINESS, ORGANIZATION, BASIS OF PRESENTATION AND SIGNIFICANT CONCENTRATIONS AND RISKS (Significant Concentrations and Risks) (Details) - Net revenues [Member]	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Product concentration [Member]
Concentration Risk [Line Items]
Concentration percentage	61.00%	65.80%	66.00%
Product concentration [Member] | Java [Member]
Concentration Risk [Line Items]
Concentration percentage	28.80%	36.70%	59.30%
Product concentration [Member] | Digital Arts [Member]
Concentration Risk [Line Items]
Concentration percentage	32.20%	29.10%	6.70%
Geographic concentration [Member]
Concentration Risk [Line Items]
Concentration percentage	45.30%	41.00%	41.40%
Geographic concentration [Member] | Beijing [Member]
Concentration Risk [Line Items]
Concentration percentage	12.30%	15.50%	36.10%
Geographic concentration [Member] | Hangzhou [Member]
Concentration Risk [Line Items]
Concentration percentage	33.00%	25.50%	5.30%

SUMMARY OF SIGNIFICANT ACCOUN43

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 03, 2014
Significant Accounting Policies [Line Items]
Short-term investment	$ 151,768,220	$ 101,390,291	$ 11,298,158
Investment income	957,373	757,300	39,930
Advertising costs	24,336,415	16,738,921	11,570,458
Government grants	939,646	1,613,436	1,254,332
Contributions to employee benefits	11,140,810	8,385,747	$ 5,850,415
Deferred offering costs				$ 615,793
PRC [Member] | RMB [Member]
Significant Accounting Policies [Line Items]
Cash, cash equivalents, time deposits and restricted time deposits	96,579,459	58,639,210
PRC [Member] | US Dollars [Member]
Significant Accounting Policies [Line Items]
Cash, cash equivalents, time deposits and restricted time deposits	8,112,557	36,216,381
HK SAR [Member] | RMB [Member]
Significant Accounting Policies [Line Items]
Cash, cash equivalents, time deposits and restricted time deposits	389	412
HK SAR [Member] | HK Dollars [Member]
Significant Accounting Policies [Line Items]
Cash, cash equivalents, time deposits and restricted time deposits	15,181	7
HK SAR [Member] | US Dollars [Member]
Significant Accounting Policies [Line Items]
Cash, cash equivalents, time deposits and restricted time deposits	$ 99,358	771,786
SG [Member] | RMB [Member]
Significant Accounting Policies [Line Items]
Cash, cash equivalents, time deposits and restricted time deposits		$ 71,178,287
US [Member] | RMB [Member]
Significant Accounting Policies [Line Items]
Cash, cash equivalents, time deposits and restricted time deposits	$ 84,296,524
US [Member] | US Dollars [Member]
Significant Accounting Policies [Line Items]
Cash, cash equivalents, time deposits and restricted time deposits	$ 8,501
Furniture [Member]
Significant Accounting Policies [Line Items]
Useful life	5 years
Minimum [Member]
Significant Accounting Policies [Line Items]
Operating lease term	1 year
Contributions to employee benefits, percentage of salary	25.50%
Minimum [Member] | Office equipment [Member]
Significant Accounting Policies [Line Items]
Useful life	3 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Operating lease term	10 years
Contributions to employee benefits, percentage of salary	52.50%
Maximum [Member] | Office equipment [Member]
Significant Accounting Policies [Line Items]
Useful life	4 years

ACCOUNTS RECEIVABLE (Schedule o

ACCOUNTS RECEIVABLE (Schedule of Accounts Receivable) (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts receivable:
Gross	$ 36,593,434	$ 32,420,858
Unearned interest	(2,463,474)	(1,971,843)
Total accounts receivable	34,129,960	30,449,015
Less: allowance for doubtful accounts	(10,295,762)	(5,776,525)	$ (2,303,029)	$ (1,306,306)
Accounts receivable, net	$ 23,834,198	$ 24,672,490

ACCOUNTS RECEIVABLE (Classifica

ACCOUNTS RECEIVABLE (Classification of Accounts Receivable) (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
ACCOUNTS RECEIVABLE [Abstract]
Accounts receivable, net - current portion	$ 22,637,451	$ 23,184,239
Accounts receivable, net - non-current portion	1,196,747	1,488,251
Accounts receivable, net	$ 23,834,198	$ 24,672,490

ACCOUNTS RECEIVABLE (Summary of

ACCOUNTS RECEIVABLE (Summary of Allowance for Doubtful Accounts) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
ACCOUNTS RECEIVABLE [Abstract]
Balance at the beginning of the year	$ 5,776,525	$ 2,303,029	$ 1,306,306
Additions charged to bad debt expense	10,134,357	7,487,174	$ 941,065
Write-off of bad debt allowance	(5,073,810)	(4,035,620)
Foreign currency translation adjustment	(541,310)	21,942	$ 55,658
Balance at the end of the year	$ 10,295,762	$ 5,776,525	$ 2,303,029

ACCOUNTS RECEIVABLE (Schedule47

ACCOUNTS RECEIVABLE (Schedule of Aging Accounts Receivable) (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
ACCOUNTS RECEIVABLE [Abstract]
Current	$ 16,072,343	$ 11,940,237
1-3 months past due	5,698,759	5,058,887
4-6 months past due	2,059,362	4,139,377
7-12 months past due	2,774,243	6,119,995
greater than one year past due	7,525,253	3,190,519
Total accounts receivable	$ 34,129,960	$ 30,449,015

PREPAID EXPENSES AND OTHER CU48

PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($)		Dec. 31, 2015	Dec. 31, 2014
PREPAID EXPENSES AND OTHER CURRENT ASSETS [Abstract]
Prepaid rental expenses		$ 2,760,388	$ 2,260,000
Interest receivable from time deposits		1,768,667	2,556,518
Prepaid advertising deposits		1,690,126	175,682
Prepaid advertising expenses		1,538,659	1,751,146
Prepaid value-added tax		1,105,122	715,157
Housing loans made to employees	[1]	352,655	436,467
Staff advances	[2]	65,153	81,903
Others	[3]	899,041	753,251
Total prepaid expenses and other current assets		$ 10,179,811	$ 8,730,124
[1]	The Company provided one-year housing loans to the employees to help them finance their purchase of apartments.
[2]	Staff advances are provided to staff for traveling and related expenses and are expensed when incurred.
[3]	Others mainly represent other deposits, professional fees and other miscellaneous prepaid expenses.

PROPERTY AND EQUIPMENT, NET (Sc

PROPERTY AND EQUIPMENT, NET (Schedule of Property and Equipment) (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment	$ 42,352,597	$ 30,043,082
Less: accumulated depreciation	(22,661,818)	(16,669,132)
Property and equipment, net	19,690,779	13,373,950
Furniture [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	1,618,584	934,033
Office equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	32,552,762	23,583,820
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 8,181,251	$ 5,525,229

PROPERTY AND EQUIPMENT, NET (50

PROPERTY AND EQUIPMENT, NET (Schedule of Depreciation Expense) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation	$ 8,829,985	$ 7,078,108	$ 4,653,914
Cost of revenues [Member]
Property, Plant and Equipment [Line Items]
Depreciation	7,797,649	6,200,645	4,001,726
Selling and marketing expenses [Member]
Property, Plant and Equipment [Line Items]
Depreciation	432,695	366,819	278,094
General and administrative expenses [Member]
Property, Plant and Equipment [Line Items]
Depreciation	486,820	431,246	347,904
Research and development expenses [Member]
Property, Plant and Equipment [Line Items]
Depreciation	$ 112,821	$ 79,398	$ 26,190

COST METHOD INVESTMENTS (Detail

COST METHOD INVESTMENTS (Details)		1 Months Ended			12 Months Ended
		Nov. 30, 2015CNY (¥)	Oct. 31, 2015CNY (¥)	Aug. 31, 2015CNY (¥)	Dec. 31, 2015USD ($)Item	Dec. 31, 2015CNY (¥)Item	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
COST METHOD INVESTMENTS [Line Items]
Cost method investments					$ 3,695,946
Cash paid to acquire equity interest					4,015,032
Sino-German Know-How Education Investment Co., Ltd. [Member]
COST METHOD INVESTMENTS [Line Items]
Cost method investments	[1]				1,847,973
Cash paid to acquire equity interest | ¥			¥ 12,000,000
Equity interest acquired			2.86%
Juesheng.com [Member]
COST METHOD INVESTMENTS [Line Items]
Cost method investments	[2]				769,989
Cash paid to acquire equity interest | ¥		¥ 5,000,000
Equity interest acquired		0.50%
Mxsoft.com [Member]
COST METHOD INVESTMENTS [Line Items]
Cost method investments	[3]				615,991
Cash paid to acquire equity interest | ¥				¥ 4,000,000
Equity interest acquired				5.71%
Other cost method investments [Member]
COST METHOD INVESTMENTS [Line Items]
Cost method investments	[4]				$ 461,993
Cash paid to acquire equity interest | ¥						¥ 3,000,000
Number of Entities Accounted Using Cost Method | Item					2	2
Other cost method investments, one [Member]
COST METHOD INVESTMENTS [Line Items]
Equity interest acquired					1.43%	1.43%
Other cost method investments, two [Member]
COST METHOD INVESTMENTS [Line Items]
Equity interest acquired					0.74%	0.74%
[1]	In October 2015, the Company paid RMB12,000,000 in cash to acquire 2.86% of the total equity interest in Sino-German Know-How Education Investment Co., Ltd, which is engaged in provision of training for senior mechanic in vehicle maintenance and repair.
[2]	In November 2015, the Company paid RMB5,000,000 in cash to acquire 0.50% of the total equity interest of an online shopping platform providing education products.
[3]	In August 2015, the Company paid RMB4,000,000 in cash to acquire 5.71% of the total equity interest in Mxsoft.com, which provides IT environment management and monitoring solution to customers.
[4]	As of December 31, 2015, the Company paid RMB3,000,000 in cash to acquire 1.43% and 0.74% equity interest in two other entities which were accounted for under cost method.

ACCRUED EXPENSES AND OTHER CU52

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES [Abstract]
VAT and other tax payables	$ 2,825,427	$ 1,913,361
Accrued payroll and employee benefits	5,758,853	4,389,540
Others	3,710,193	2,136,509
Total	$ 12,294,473	$ 8,439,410

NET REVENUES (Details)

NET REVENUES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
NET REVENUES [Abstract]
Tuition fee	$ 188,641,628	$ 135,932,251	$ 92,927,773
Certification service fee	4,411,095	2,936,647	2,001,705
Others	182,310	467,433	897,862
Business taxes and surcharges	(4,045,503)	(3,132,314)	(2,993,680)
Total net revenues	$ 189,189,530	$ 136,204,017	$ 92,833,660

INCOME TAXES (Schedule of Incom

INCOME TAXES (Schedule of Income before Income Taxes) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Income before income taxes	$ 29,346,071	$ 27,096,072	$ 16,318,357
PRC [Member]
Income Taxes [Line Items]
Income before income taxes	32,246,850	23,827,863	16,533,265
Hong Kong [Member]
Income Taxes [Line Items]
Income before income taxes	(306,499)	(319,685)	(182,447)
Cayman Islands [Member]
Income Taxes [Line Items]
Income before income taxes	$ (2,594,280)	$ 3,587,894	$ (32,461)

INCOME TAXES (Schedule of Inc55

INCOME TAXES (Schedule of Income Tax Expenses) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
INCOME TAXES [Abstract]
Current income tax expense	$ 4,108,376	$ 3,087,902	$ 3,323,591
Deferred income tax benefit	(3,471,315)	(683,078)	(1,052,265)
Total	$ 637,061	$ 2,404,824	$ 2,271,326

INCOME TAXES (Schedule of Inc56

INCOME TAXES (Schedule of Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effective income tax rate reconciliation [Line Items]
PRC statutory income tax rate	25.00%	25.00%	25.00%
Cayman and HK entities not subject to income taxes	2.50%	(3.00%)	0.30%
Research and development bonus deduction	(3.30%)	(2.70%)	(3.30%)
Non-deductible selling, general and administrative expenses
Share based compensation	4.50%	3.80%	1.20%
Other non-deductible selling, general and administrative expenses	0.60%	0.50%	0.40%
Change in valuation allowance	3.10%	6.40%	(0.90%)
Deemed profit method differential	(0.00%)	(0.10%)	(0.20%)
Others	0.10%	0.10%	0.20%
Actual income tax expense	2.20%	8.90%	13.90%
ANTE [Member]
Non-deductible selling, general and administrative expenses
Preferential tax rates	0.10%	(1.00%)	(10.20%)
Tarena Hangzhou [Member]
Effective income tax rate reconciliation [Line Items]
PRC statutory income tax rate			25.00%
Non-deductible selling, general and administrative expenses
Preferential tax rates	0.70%	(0.10%)	1.40%
Tax holiday	(31.10%)	(20.00%)

INCOME TAXES (Schedule of Defer

INCOME TAXES (Schedule of Deferred Income Tax Assets) (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
INCOME TAXES [Abstract]
Accounts receivable	$ 5,330,829	$ 2,729,700
Tax loss carry forwards	1,087,954	691,350
Advertising expense	2,104,573	1,151,432
Total deferred income tax assets	8,523,356	4,572,482
Valuation allowance	(3,097,761)	(2,347,093)	$ (598,117)	$ (731,828)
Deferred income tax assets, net	$ 5,425,595	$ 2,225,389

INCOME TAXES (Summary of Valuat

INCOME TAXES (Summary of Valuation Allowance) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
INCOME TAXES [Abstract]
Balance at the beginning of the year	$ 2,347,093	$ 598,117	$ 731,828
Additions of valuation allowance	1,456,539	1,823,101	525,061
Reduction of valuation allowance	(532,478)	(78,687)	(678,916)
Foreign currency translation adjustment	(173,393)	4,562	20,144
Balance at the end of the year	$ 3,097,761	$ 2,347,093	$ 598,117

INCOME TAXES (Schedule of Unrec

INCOME TAXES (Schedule of Unrecognized Tax Benefits) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
INCOME TAXES [Abstract]
Balance at beginning of year	$ 6,033,774	$ 3,077,693	$ 1,700,106
Increase related to current year tax positions	8,198,639	5,768,868	2,843,585
Settlement	(5,551,468)	(2,813,061)	(1,539,717)
Foreign currency translation adjustment	(456,918)	274	73,719
Balance at end of year	$ 8,224,027	$ 6,033,774	$ 3,077,693

INCOME TAXES (Narrative) (Detai

INCOME TAXES (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
INCOME TAXES [Abstract]
Per share effect of the tax holiday	$ 0.17	$ 0.10
Undistributed earnings	$ 93,048,180	$ 77,848,789
Interest and penalty expenses
Unrecognized tax benefits that would impact the income tax rate	$ 7,576,459	$ 5,822,319
Unrecognized tax benefits included in income taxes payable	6,543,175	4,849,529
Unrecognized tax benefits included in other non-current liabilities	569,729	384,686
Unrecognized tax benefits that would reduce deferred tax assets	1,111,123	$ 799,559
Unrecognized tax benefits reasonably possible will be recognized	7,654,298
Operating Loss Carryforwards [Line Items]
Tax losses carry forwards	$ 4,351,816
PRC statutory income tax rate	25.00%	25.00%	25.00%
Tarena Hangzhou [Member]
Operating Loss Carryforwards [Line Items]
PRC statutory income tax rate			25.00%
2017 [Member]
Operating Loss Carryforwards [Line Items]
Tax losses carry forwards	$ 11,608
2018 [Member]
Operating Loss Carryforwards [Line Items]
Tax losses carry forwards	89,528
2019 [Member]
Operating Loss Carryforwards [Line Items]
Tax losses carry forwards	1,760,046
2020 [Member]
Operating Loss Carryforwards [Line Items]
Tax losses carry forwards	$ 2,490,634

RELATED PARTY TRANSACTIONS (Sch

RELATED PARTY TRANSACTIONS (Schedule of Related Party Transactions) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Tuition Fees [Member]
Related Party Transaction [Line Items]
Related party transactions			$ 8,672,904
Guarantee Fee [Member]
Related Party Transaction [Line Items]
Related party transactions		$ 18,188	90,490
Service Fee [Member]
Related Party Transaction [Line Items]
Related party transactions	$ 329,767	108,068	64,586
Mr. Han [Member]
Related Party Transaction [Line Items]
Maximum amount of undiscounted guarantee payments		$ 217,356
Guarantee liability
Payment to discharge guarantee obligation			78,931
Mr. Han [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Guarantee term	12 months
Mr. Han [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Guarantee term	20 months
Mr. Han [Member] | Amounts Received [Member]
Related Party Transaction [Line Items]
Related party transactions			(141,329)
Mr. Han [Member] | Repayments [Member]
Related Party Transaction [Line Items]
Related party transactions			232,879
Chuanbang [Member] | Amounts Received [Member]
Related Party Transaction [Line Items]
Related party transactions			(153,386)
Chuanbang [Member] | Repayments [Member]
Related Party Transaction [Line Items]
Related party transactions			$ 153,386
Precise Advance Limited [Member] | Amounts Received [Member]
Related Party Transaction [Line Items]
Related party transactions	$ (230,000)
Precise Advance Limited [Member] | Repayments [Member]
Related Party Transaction [Line Items]
Related party transactions	$ 230,000

ORDINARY SHARES AND STATUTORY62

ORDINARY SHARES AND STATUTORY RESERVE (Ordinary Shares) (Details)	Dec. 16, 2008shares	Jan. 16, 2004USD ($)$ / sharesshares	Apr. 30, 2014USD ($)$ / shares	Apr. 03, 2014USD ($)shares	Apr. 09, 2013USD ($)$ / sharesshares	Dec. 31, 2014$ / sharesshares	Dec. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2014USD ($)$ / sharesshares	Dec. 31, 2013USD ($)shares	Feb. 27, 2014$ / sharesshares	Dec. 31, 2012shares	Dec. 15, 2008shares	Oct. 08, 2003USD ($)$ / sharesshares
Class of Stock [Line Items]
Authorized share capital													$ 150,000
Conversion ratio	10
Ordinary shares authorized | shares	90,000,000									1,000,000,000		9,000,000	90,000,000
Ordinary shares, par value | $ / shares										$ 0.001			$ 0.001
Ordinary shares issued | shares	13,580,000											1,358,000
Ordinary shares outstanding | shares	13,580,000			50,657,389								1,358,000
Preferred shares authorized | shares	60,000,000											6,000,000	60,000,000
Preferred shares, par value | $ / shares													$ 0.001
Preferred shares issued | shares	15,891,250											1,589,125
Preferred shares outstanding | shares	15,891,250											1,589,125
Value of shares issued in IPO								$ 92,223,639
Value of shares issued in Private Placement								13,500,000
Stock issuance costs			$ 4,031,356					$ 4,031,356
Share price | $ / shares						$ 8.60		$ 8.60
Reclassification of the balances between additional paid-in capital and accumulated deficit
Ordinary shares issued upon exercise of share options and vesting of non-vested shares | shares							3,015,872	1,786,449
Total consideration of Shares repurchased							$ 7,738,834
Techedu Limited [Member]
Class of Stock [Line Items]
Debt amount					$ 5,000,000
Interest rate					19.00%
Term					30 months
Ordinary Shares [Member] | Tarena Limited [Member]
Class of Stock [Line Items]
Value of shares issued during period					$ 4,000,000
Shares issued in IPO | shares					916,848
Share price | $ / shares					$ 4.3628
Additional Paid-in Capital [Member]
Class of Stock [Line Items]
Value of shares issued in IPO								$ 92,212,139
Value of shares issued in Private Placement								13,498,500
Conversion of convertible redeemable preferred shares to ordinary shares				$ 111,929,780
Reclassification of the balances between additional paid-in capital and accumulated deficit								$ (85,568,016)
Total consideration of Shares repurchased
Retained Earnings (Accumulated Deficit) [Member]
Class of Stock [Line Items]
Value of shares issued in IPO
Value of shares issued in Private Placement
Reclassification of the balances between additional paid-in capital and accumulated deficit								$ 85,568,016
Total consideration of Shares repurchased
Treasury Shares [Member]
Class of Stock [Line Items]
Value of shares issued in IPO
Value of shares issued in Private Placement
Conversion of convertible redeemable preferred shares to ordinary shares
Reclassification of the balances between additional paid-in capital and accumulated deficit
Share repurchase plan, authorized amount							$ 20,000,000
Shares repurchased | shares							926,113
Total consideration of Shares repurchased							$ 7,738,834
Class A [Member]
Class of Stock [Line Items]
Ordinary shares authorized | shares						860,000,000	860,000,000	860,000,000		860,000,000
Ordinary shares, par value | $ / shares			$ 0.001			$ 0.001	$ 0.001	$ 0.001
Ordinary shares issued | shares						23,712,758	44,914,538	23,712,758
Ordinary shares outstanding | shares				16,800,000		23,712,758	43,988,425	23,712,758
Share price | $ / shares			$ 9
Conversion of Class B ordinary shares into shares | shares						8,924,365	18,158,128
Ordinary shares issued upon exercise of share options and vesting of non-vested shares | shares						1,788,393	3,043,652
Class A [Member] | Ordinary Shares [Member]
Class of Stock [Line Items]
Ordinary shares issued | shares						23,712,758	44,914,538	23,712,758
Shares issued in IPO | shares								11,500,000
Value of shares issued in IPO								$ 11,500
Shares issued in Private Placement | shares								1,500,000
Value of shares issued in Private Placement								$ 1,500
Reclassification of the balances between additional paid-in capital and accumulated deficit
Total consideration of Shares repurchased
Class B [Member]
Class of Stock [Line Items]
Ordinary shares authorized | shares						40,000,000	40,000,000	40,000,000		40,000,000
Ordinary shares, par value | $ / shares						$ 0.001	$ 0.001	$ 0.001
Ordinary shares issued | shares						28,733,024	10,574,896	28,733,024
Ordinary shares outstanding | shares				33,857,389		28,733,024	10,574,896	28,733,024
Class B [Member] | Ordinary Shares [Member]
Class of Stock [Line Items]
Ordinary shares issued | shares						28,733,024	10,574,896	28,733,024	12,226,558		10,851,287
Shares issued in IPO | shares
Value of shares issued in IPO
Shares issued in Private Placement | shares
Value of shares issued in Private Placement
Conversion of convertible redeemable preferred shares to ordinary shares				$ 25,431
Conversion of convertible redeemable preferred shares to ordinary shares, shares | shares				25,430,831
Reclassification of the balances between additional paid-in capital and accumulated deficit
Total consideration of Shares repurchased
Reserved Shares [Member]
Class of Stock [Line Items]
Ordinary shares authorized | shares										100,000,000
Series A [Member]
Class of Stock [Line Items]
Shares issued during period | shares		8,571,430
Value of shares issued during period		$ 500,000
Share price | $ / shares		$ 0.05833
Series A [Member] | Techedu Limited [Member]
Class of Stock [Line Items]
Shares issued during period | shares					1,146,059
Value of shares issued during period					$ 5,000,000
Conversion of convertible redeemable preferred shares to ordinary shares, shares | shares					1,146,059
Share price | $ / shares					$ 4.3628
Series A [Member] | Tarena Limited [Member]
Class of Stock [Line Items]
Shares issued during period | shares					229,212
Value of shares issued during period					$ 1,000,000
Conversion of convertible redeemable preferred shares to ordinary shares, shares | shares					229,212

ORDINARY SHARES AND STATUTORY63

ORDINARY SHARES AND STATUTORY RESERVE (Statutory Reserve) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
ORDINARY SHARES AND STATUTORY RESERVE [Abstract]
Appropriations	$ 5,264,194	$ 2,572,599	$ 1,972,313
Statutory reserve	$ 11,511,634	$ 6,247,440	$ 3,674,841

PREFERRED SHARES (Details)

PREFERRED SHARES (Details) - USD ($)	Aug. 11, 2011	Sep. 25, 2008	Jan. 16, 2004	Apr. 30, 2014	Apr. 03, 2014	Dec. 31, 2014	Dec. 31, 2013
Temporary Equity [Line Items]
Share price						$ 8.60
Stock issuance costs				$ 4,031,356		$ 4,031,356
Additional Paid-in Capital [Member]
Temporary Equity [Line Items]
Conversion of convertible redeemable preferred shares					$ 111,929,780
Series A [Member]
Temporary Equity [Line Items]
Shares issued during period			8,571,430
Value of shares issued during period			$ 500,000
Share price			$ 0.05833
Series B [Member]
Temporary Equity [Line Items]
Shares issued during period		5,630,630
Value of shares issued during period		$ 5,000,000
Share price		$ 0.888
Accretion of convertible redeemable preferred shares						$ 576,431	$ 2,072,284
Conversion of debt		$ 1,500,000
Shares issued for debt conversion		1,689,190
Series C [Member]
Temporary Equity [Line Items]
Shares issued during period	10,914,852
Value of shares issued during period	$ 19,974,179
Share price	$ 1.83
Stock issuance costs	$ 218,376
Accretion of convertible redeemable preferred shares							$ 42,287,776
Class B [Member] | Ordinary Shares [Member]
Temporary Equity [Line Items]
Shares issued for conversion of convertible redeemable preferred shares					25,430,831
Conversion of convertible redeemable preferred shares					$ 25,431

SHARE BASED COMPENSATION (Narra

SHARE BASED COMPENSATION (Narrative) (Details) - USD ($)

Aug. 04, 2015

Jun. 16, 2015

Apr. 03, 2015

Nov. 11, 2014

Apr. 03, 2014

Dec. 31, 2014

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2011

Apr. 30, 2014

Nov. 27, 2012

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Options granted

615,624

1,805,784

2,517,810

Expiration period

10 years

Share options exercised

3,015,872

1,786,449

Total intrinsic value of options exercised

$ 37,874,734

$ 25,047,974

Share price

$ 8.60

$ 8.60

Non-vested shares granted

25,000

29,724

Unrecognized stock option compensation expense

$ 9,465,571

Unrecognized stock option compensation expense, period for recognition

1 year 10 months 20 days

Unrecognized non-vested shares compensation expense

$ 39,690

Unrecognized non-vested shares compensation expense, period for recognition

3 months

Fair value of vested restricted shares

$ 251,687

$ 27,120

Class A [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share options exercised

1,788,393

3,043,652

Share price

$ 9

Mr. Han [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share options exercised

2,439,014

Mr. Han [Member] | Class A [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Shares issued

2,439,014

Value of shares issued

$ 2,783,957

Minimum [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Exercise prices

$ 0.89

Vesting period

1 year

Share price

$ 9.28

$ 3.75

Maximum [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Exercise prices

$ 4.36

Vesting period

4 years

Share price

$ 12.85

$ 5.69

January 1 [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Options granted

2,029,386

124,000

Vesting period

4 years

5 years

Expiration period

10 years

10 years

Share price

$ 3.75

$ 0.63

February 20 [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Options granted

1,805,784

Vesting period

4 years

Expiration period

10 years

Share price

$ 8.60

$ 8.60

April 3 [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share price

$ 10

$ 9

Non-vested shares granted

25,000

27,780

Non-vested shares granted, aggregate value

$ 250,000

$ 250,000

September 16 [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Options granted

30,000

Expiration period

10 years

Share price

$ 5.69

September 16 [Member] | IPO [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

25.00%

September 16 [Member] | Remaining [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting period

4 years

Vesting percentage

75.00%

September 16, Second Issuance [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Options granted

458,424

Expiration period

10 years

Share price

$ 5.69

September 16, Second Issuance [Member] | IPO [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

25.00%

September 16, Second Issuance [Member] | Remaining [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting period

4 years

Vesting percentage

75.00%

September 26 [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Options granted

1,533,020

Vesting period

5 years

Expiration period

10 years

Share price

$ 0.83

November 11 [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Non-vested shares granted

1,944

November 11 [Member] | Immediately [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting percentage

1.00%

2008 Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Authorized

8,184,990

6,002,020

2014 Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Authorized

1,833,696

1,833,696

SHARE BASED COMPENSATION (Summa

SHARE BASED COMPENSATION (Summary of Stock Option Activity) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Share Options
Outstanding, beginning balance	8,038,950	8,134,830	5,639,020
Granted	615,624	1,805,784	2,517,810
Exercised	(3,015,872)	(1,786,449)
Forfeited	(56,926)	(115,215)	(22,000)
Expired
Outstanding, ending balance	5,581,776	8,038,950	8,134,830
Vested and expected to vest	4,922,651
Exercisable	2,863,674
Weighted Average Exercise Price
Outstanding, beginning balance	$ 1.44	$ 0.82	$ 0.37
Granted	3.38	3.05	$ 1.83
Exercised	1.20	0.14
Forfeited	$ 3.33	$ 2.91	$ 1.83
Expired
Outstanding, ending balance	$ 1.77	$ 1.44	$ 0.82
Vested and expected to vest	1.63
Exercisable	$ 0.92
Weighted Average Remaining Contractual Years
Outstanding	5 years 8 months 5 days	6 years 2 months 8 days
Vested and expected to vest	5 years 4 months 20 days
Exercisable	3 years 7 months 17 days
Outstanding, Aggregate Intrinsic Value	$ 48,411,629	$ 77,657,938
Vested and expected to vest, Aggregate Intrinsic Value	43,387,240
Exercisable, Aggregate Intrinsic Value	$ 27,271,499

SHARE BASED COMPENSATION (Sum67

SHARE BASED COMPENSATION (Summary of Fair Value Assumptions) (Details)	12 Months Ended
	Dec. 31, 2015$ / shares	Dec. 31, 2014$ / shares	Dec. 31, 2013$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility		51.70%	52.00%
Expected dividends yield	0.00%	0.00%	0.00%
Exercise multiple	2	2.2	2.2
Risk-free interest rate per annum		3.81%
Estimated fair value of underlying ordinary shares (per share)		$ 8.60
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	62.30%
Risk-free interest rate per annum	2.68%		2.27%
Estimated fair value of underlying ordinary shares (per share)	$ 9.28		$ 3.75
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	70.90%
Risk-free interest rate per annum	2.99%		3.38%
Estimated fair value of underlying ordinary shares (per share)	$ 12.85		$ 5.69

SHARE BASED COMPENSATION (Sched

SHARE BASED COMPENSATION (Schedule of Fair Value of the Options Granted) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SHARE BASED COMPENSATION [Abstract]
Weighted average grant date fair value of option per share	$ 9.16	$ 6.35	$ 2.13
Aggregate grant date fair value of options	$ 5,640,789	$ 11,467,907	$ 5,372,463

SHARE BASED COMPENSATION (Sum69

SHARE BASED COMPENSATION (Summary of Non-vested Shares Activity) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Number of Non-vested Shares
Outstanding, beginning balance	27,780
Granted	25,000	29,724
Vested	(27,780)	(1,944)
Forfeited
Outstanding, ending balance	25,000	27,780
Weighted Average Grant Date Fair Value
Outstanding, beginning balance	$ 9.06
Granted	9.63	$ 9.38
Vested	$ 9.06	$ 13.95
Forfeited
Outstanding, ending balance	$ 9.63	$ 9.06

EARNINGS (LOSS) PER SHARE (Sche

EARNINGS (LOSS) PER SHARE (Schedule of Basic and Diluted Earnings (Loss) per Share) (Details) - USD ($)	12 Months Ended			24 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015
Numerator:
Net income (loss) attributable to Class A and Class B ordinary shareholders	$ 28,709,010	$ 24,114,817	$ (30,313,029)
Net income (loss) for basic and diluted earnings (loss) per share	$ 28,709,010	$ 20,869,715	$ (30,313,029)
Denominator:
Weighted average number of Class A and Class B ordinary shares outstanding	53,767,810	41,223,389	10,930,412
Dilutive effect of outstanding share options	4,983,046	6,546,743
Denominator for diluted earnings (loss) per share	58,750,856	47,770,132	10,930,412
Basic earnings (loss) per Class A and Class B ordinary share	$ 0.53	$ 0.51	$ (2.77)
Diluted earnings (loss) per Class A and Class B ordinary share	$ 0.49	$ 0.44	$ (2.77)
Series A [Member]
Numerator:
Earnings allocated to participating convertible redeemable preferred shares		$ (918,266)
Series B [Member]
Numerator:
Earnings allocated to participating convertible redeemable preferred shares		(934,046)
Series C [Member]
Numerator:
Earnings allocated to participating convertible redeemable preferred shares		$ (1,392,790)

EARNINGS (LOSS) PER SHARE (Sc71

EARNINGS (LOSS) PER SHARE (Schedule of Anti-Dilutive Shares) (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares			8,134,830
Preferred shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares			25,430,831

COMMITMENTS AND CONTINGENCIES72

COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
COMMITMENTS AND CONTINGENCIES [Abstract]
Gross rent expenses	$ 17,504,333	$ 12,615,613	$ 9,684,871
Sublease rental income	61,403	$ 230,503	$ 114,361
Future minimum lease payments:
2,016	14,828,199
2,017	13,603,574
2,018	9,070,769
2,019	6,367,021
2,020	4,217,222
2021 and thereafter	7,974,602
Total	$ 56,061,387

PARENT ONLY FINANCIAL INFORMA73

PARENT ONLY FINANCIAL INFORMATION (Condensed Balance Sheets) (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Apr. 30, 2014	Apr. 03, 2014	Feb. 27, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 16, 2008	Dec. 15, 2008	Oct. 08, 2003
Current assets:
Time deposits	$ 69,280,200	$ 106,834,876
Restricted time deposits	23,099,668
Prepaid expenses and other current assets	10,179,811	$ 8,730,124
Total current assets	204,342,426	181,409,030
Other non-current assets	8,178,969	4,369,889
Total assets	254,695,560	217,954,174
Current liabilities:
Accrued expenses and other current liabilities	12,294,473	8,439,410
Other non-current liabilities	1,437,238	1,637,756
Total liabilities	$ 48,551,933	$ 35,066,942
Commitments and contingencies
Shareholders' equity:
Treasury shares (nil and 926,113 Class A ordinary shares as of December 31, 2014 and 2015, respectively, at cost)	$ (7,738,834)
Additional paid-in capital	144,776,619	$ 135,886,427
Accumulated other comprehensive income (loss)	(4,905,419)	1,701,598
Retained earnings	73,955,772	45,246,762
Total shareholders' equity	206,143,627	182,887,232				$ (63,284,084)	$ (34,966,849)
Total liabilities and shareholders' equity	254,695,560	217,954,174
Ordinary shares
Ordinary shares, par value					$ 0.001					$ 0.001
Authorized					1,000,000,000			90,000,000	9,000,000	90,000,000
Issued								13,580,000	1,358,000
Outstanding				50,657,389				13,580,000	1,358,000
Class A [Member]
Shareholders' equity:
Ordinary shares	$ 44,914	$ 23,712
Ordinary shares
Ordinary shares, par value	$ 0.001	$ 0.001	$ 0.001
Authorized	860,000,000	860,000,000			860,000,000
Issued	44,914,538	23,712,758
Outstanding	43,988,425	23,712,758		16,800,000
Treasury shares	926,113
Class B [Member]
Shareholders' equity:
Ordinary shares	$ 10,575	$ 28,733
Ordinary shares
Ordinary shares, par value	$ 0.001	$ 0.001
Authorized	40,000,000	40,000,000			40,000,000
Issued	10,574,896	28,733,024
Outstanding	10,574,896	28,733,024		33,857,389
Parent Company [Member]
Current assets:
Cash	$ 966,276	$ 1,296,102				$ 52,878	$ 133,167
Time deposits	61,196,856	$ 92,182,582
Restricted time deposits	23,099,668
Prepaid expenses and other current assets	1,669,839	$ 2,256,709
Total current assets	86,932,639	95,735,393
Investments and loans to subsidiaries	121,082,908	88,854,260
Total assets	208,015,547	184,589,653
Current liabilities:
Accrued expenses and other current liabilities	1,004,410	449,351
Other non-current liabilities	867,510	1,253,070
Total liabilities	$ 1,871,920	$ 1,702,421
Commitments and contingencies
Shareholders' equity:
Treasury shares (nil and 926,113 Class A ordinary shares as of December 31, 2014 and 2015, respectively, at cost)	$ (7,738,834)
Additional paid-in capital	144,776,619	$ 135,886,427
Accumulated other comprehensive income (loss)	(4,905,419)	1,701,598
Retained earnings	73,955,772	45,246,762
Total shareholders' equity	206,143,627	182,887,232
Total liabilities and shareholders' equity	208,015,547	184,589,653
Parent Company [Member] | Class A [Member]
Shareholders' equity:
Ordinary shares	$ 44,914	$ 23,712
Ordinary shares
Ordinary shares, par value	$ 0.001	$ 0.001
Authorized	860,000,000	860,000,000
Issued	44,914,538	23,712,758
Outstanding	43,988,425	23,712,758
Treasury shares	926,113
Parent Company [Member] | Class B [Member]
Shareholders' equity:
Ordinary shares	$ 10,575	$ 28,733
Ordinary shares
Ordinary shares, par value	$ 0.001	$ 0.001
Authorized	40,000,000	40,000,000
Issued	10,574,896	28,733,024
Outstanding	10,574,896	28,733,024

PARENT ONLY FINANCIAL INFORMA74

PARENT ONLY FINANCIAL INFORMATION (Condensed Statements of Comprehensive Income) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Income Statements, Captions [Line Items]
General and administrative expenses	$ (40,358,751)	$ (29,947,822)	$ (16,223,871)
Operating income (loss)	25,323,934	19,168,491	$ 13,482,920
Foreign currency exchange gains (losses)	(4,737,644)	1,196,530
Interest income	6,862,762	4,360,315	$ 1,541,175
Other income	1,897,019	2,370,736	1,294,262
Income before income taxes	29,346,071	27,096,072	16,318,357
Income tax expense	(637,061)	(2,404,824)	(2,271,326)
Net income	28,709,010	24,691,248	14,047,031
Other comprehensive income
Foreign currency translation adjustment, net of nil income tax	(6,607,017)	66,678	1,150,824
Comprehensive income	22,101,993	24,757,926	15,197,855
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
General and administrative expenses	(681,129)	(170,440)	(57,172)
Operating income (loss)	(681,129)	(170,440)	(57,172)
Equity in income of subsidiaries	31,303,290	21,103,354	$ 14,079,492
Foreign currency exchange gains (losses)	(5,126,911)	1,180,466
Interest income	2,828,200	2,288,698	$ 24,711
Other income	385,560	289,170
Income before income taxes	$ 28,709,010	$ 24,691,248	$ 14,047,031
Income tax expense
Net income	$ 28,709,010	$ 24,691,248	$ 14,047,031
Other comprehensive income
Foreign currency translation adjustment, net of nil income tax	(6,607,017)	66,678	1,150,824
Comprehensive income	$ 22,101,993	$ 24,757,926	$ 15,197,855

PARENT ONLY FINANCIAL INFORMA75

PARENT ONLY FINANCIAL INFORMATION (Condensed Statements of Cash Flows) (Details) - USD ($)	12 Months Ended			24 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015
Operating activities:
Net cash provided by (used in) operating activities	$ 55,842,680	$ 28,459,868	$ 29,705,551
Investing activities:
Purchase of time deposits	(102,627,336)	(115,280,749)	(17,286,182)
Proceeds from maturity of time deposits	110,855,012	3,634,521	6,456,091
Net cash used in investing activities	$ (11,614,868)	(119,458,540)	(19,537,130)
Financing activities:
Payment of IPO costs		(3,532,025)	$ (499,331)
Issuance of Class A ordinary shares upon the IPO		96,254,995
Issuance of Class A ordinary shares in private placement concurrent with the IPO		13,500,000
Issuance of Class A ordinary shares in connection with exercise of share options	$ 3,606,345	$ 248,812
Repurchase of ordinary shares	(7,738,834)
Net cash provided by (used in) financing activities	(4,132,489)	$ 106,471,782	$ (590,881)
Non-cash investing and financing activities:
Accrual of IPO costs			107,866
Series A [Member]
Non-cash investing and financing activities:
Conversion of convertible redeemable preferred shares		$ 419,776	$ 80,224
Series B [Member]
Non-cash investing and financing activities:
Conversion of convertible redeemable preferred shares		16,324,300
Series C [Member]
Non-cash investing and financing activities:
Conversion of convertible redeemable preferred shares		95,211,135
Parent Company [Member]
Operating activities:
Net cash provided by (used in) operating activities	1,381,505	3,226,599	$ (3,570)
Investing activities:
Purchase of time deposits	(94,501,933)	(92,682,582)
Proceeds from maturity of time deposits	$ 96,923,091	500,000
Investments made to subsidiaries		(17,000,000)
Net cash used in investing activities	$ 2,421,158	(109,182,582)
Financing activities:
Payment of IPO costs		(2,804,600)	$ (76,719)
Issuance of Class A ordinary shares upon the IPO		96,254,995
Issuance of Class A ordinary shares in private placement concurrent with the IPO		13,500,000
Issuance of Class A ordinary shares in connection with exercise of share options	$ 3,606,345	$ 248,812
Advances from a related party	230,000
Repayment of advances from a related party	(230,000)
Repurchase of ordinary shares	(7,738,834)
Net cash provided by (used in) financing activities	(4,132,489)	$ 107,199,207	$ (76,719)
Net increase (decrease) in cash	(329,826)	1,243,224	(80,289)
Cash at beginning of year	1,296,102	52,878	133,167	$ 52,878
Cash at end of year	$ 966,276	$ 1,296,102	52,878	$ 966,276
Non-cash investing and financing activities:
Accrual of IPO costs			107,866
Parent Company [Member] | Series A [Member]
Non-cash investing and financing activities:
Conversion of convertible redeemable preferred shares		$ 419,776	$ 80,224
Parent Company [Member] | Series B [Member]
Non-cash investing and financing activities:
Conversion of convertible redeemable preferred shares		16,324,300
Parent Company [Member] | Series C [Member]
Non-cash investing and financing activities:
Conversion of convertible redeemable preferred shares		$ 95,211,135

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - Subsequent Event [Member] $ / shares in Units, $ in Millions	Mar. 07, 2016USD ($)$ / shares
Subsequent Event [Line Items]
Dividend declared per ordinary share | $ / shares	$ 0.15
Amount of cash dividends to be paid | $	$ 8.6