China XD Plastics (CXDC) 10-Q 14 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Nov. 08, 2019
Document And Entity Information Abstract
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Entity Registrant Name	China XD Plastics Co Ltd
Entity Central Index Key	0001353970
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2019
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Units Outstanding		66,948,841
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	NV
Entity File Number	000-53131
Document Quarterly Report	true
Document Transition Report	false

UNAUDITED CONDENSED CONSOLIDATE

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 10,509,402	$ 41,301,817
Restricted cash	224,647,340	325,690,023
Accounts receivable, net of allowance for doubtful accounts	326,831,373	294,688,288
Inventories	699,002,558	620,033,195
Prepaid expenses and other current assets	234,507,419	132,218,528
Total current assets	1,495,498,092	1,413,931,851
Property, plant and equipment, net	798,105,488	775,941,280
Land use rights, net	28,465,372	29,796,795
Long-term prepayments to equipment and construction suppliers	436,326,962	530,636,319
Operating lease right-of-use assets, net	15,601,773
Other non-current assets	801,296	3,212,986
Total assets	2,774,798,983	2,753,519,231
Current liabilities:
Short-term bank loans, including current portion of long-term bank loans	619,522,749	729,666,920
Bills payable	431,288,254	618,166,453
Accounts payable	205,440,261	84,958,469
Amounts due to related parties	28,444,767	18,365,738
Income taxes payable	21,105,696	15,975,367
Operating lease liabilities, current	1,390,531
Accrued expenses and other current liabilities	98,503,263	126,926,898
Total current liabilities	1,405,695,521	1,594,059,845
Long-term bank loans, excluding current portion	276,518,446	111,808,244
Deferred income	93,214,165	99,583,477
Operating lease liabilities, non-current	14,513,462
Other non-current liabilities	95,038,794	101,573,772
Total liabilities	1,884,980,388	1,907,025,338
Redeemable Series D convertible preferred stock (redemption amount of nil and US$280,650,800 as of September 30, 2019 and December 31, 2018, respectively)		97,576,465
Stockholders' equity:
Series B preferred stock	100	100
Common stock, US$0.0001 par value, 500,000,000 shares authorized, 66,969,841 and 50,969,841 shares issued, 66,948,841 and 50,948,841 shares outstanding as of September 30, 2019 and December 31, 2018, respectively	6,697	5,097
Treasury stock, 21,000 shares at cost	(92,694)	(92,694)
Additional paid-in capital	184,208,447	86,633,582
Retained earnings	785,161,135	717,103,890
Accumulated other comprehensive loss	(79,465,090)	(54,732,547)
Total stockholders' equity	889,818,595	748,917,428
Commitments and contingencies
Total liabilities, redeemable convertible preferred stock and stockholders' equity	$ 2,774,798,983	$ 2,753,519,231

UNAUDITED CONDENSED CONSOLIDA_2

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Redeemable Series D convertible preferred stock, redemption amount	$ 280,650,800	$ 280,650,800
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	66,948,841	50,969,841
Common stock, shares outstanding	66,948,841	50,948,841
Treasury shares, shares	21,000	21,000

UNAUDITED CONDENSED CONSOLIDA_3

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Revenues	$ 373,159,091	$ 297,224,740	$ 1,137,698,978	$ 925,007,293
Cost of revenues	(313,044,518)	(249,997,804)	(961,994,051)	(767,759,035)
Gross profit	60,114,573	47,226,936	175,704,927	157,248,258
Selling expenses	(431,070)	(2,741,156)	(956,300)	(7,354,876)
General and administrative expenses	(5,999,123)	(8,117,769)	(20,539,101)	(28,341,545)
Research and development expenses	(19,908,789)	(23,342,321)	(39,522,696)	(33,680,855)
Total operating expenses	(26,338,982)	(34,201,246)	(61,018,097)	(69,377,276)
Operating income	33,775,591	13,025,690	114,686,830	87,870,982
Interest income	338,033	264,838	1,228,169	3,607,136
Interest expense	(17,036,345)	(13,393,886)	(46,595,864)	(37,562,666)
Foreign currency exchange gains	4,065,890	4,387,166	4,975,637	6,064,328
Losses on foreign currency option contracts				(520,981)
Gains on disposal of a subsidiary			518,491
Government grant	1,405,284	1,145,703	5,111,437	4,001,746
Total non-operating expense, net	(11,227,138)	(7,596,179)	(34,762,130)	(24,410,437)
Income before income taxes	22,548,453	5,429,511	79,924,700	63,460,545
Income tax benefit (expense)	(5,583,240)	3,535,430	(11,867,455)	(8,171,625)
Net income	$ 16,965,213	$ 8,964,941	$ 68,057,245	$ 55,288,920
Earnings per common share:
Basic and diluted	$ 0.25	$ 0.13	$ 1.02	$ 0.83
Net income	$ 16,965,213	$ 8,964,941	$ 68,057,245	$ 55,288,920
Other comprehensive losses
Foreign currency translation adjustment, net of nil income taxes	(22,690,259)	(28,497,101)	(24,732,543)	(38,141,701)
Total Comprehensive income (losses)	$ (5,725,046)	$ (19,532,160)	$ 43,324,702	$ 17,147,219

UNAUDITED CONDENSED CONSOLIDA_4

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net cash (used in) provided by operating activities	$ (183,155,418)	$ 115,513,922
Cash flows from investing activities:
Purchase of and deposits for property, plant and equipment	(54,255,192)	(430,839,423)
Refund of prepayment for building purchase	15,810,261
Net proceeds from sales of a subsidiary	7,296,921
Proceeds from maturity of time deposits		517,686,072
Purchase of time deposits		(236,428,396)
Refund of deposit from equipment suppliers		121,464,390
Deposits for acquisition of equity		(3,640,688)
Refund of deposits for acquisition of equity		15,577,880
Government grant related to the construction of Sichuan plant		10,324,859
Net cash used in investing activities	(31,148,010)	(5,855,306)
Cash flows from financing activities:
Proceeds from bank borrowings	1,647,171,688	719,994,473
Repayments of bank borrowings	(1,569,203,033)	(757,018,030)
Proceeds from interest-free advances from related parties	79,969,718	14,256,429
Repayments of interest-free advances from related parties	(68,543,743)
Investment received in advance from a related party		75,567,512
Refund of investment received in advance from a related party		(75,567,512)
Net cash provided by (used in) financing activities	89,394,630	(22,767,128)
Effect of foreign currency exchange rate changes on cash, cash equivalents and restricted cash	(6,926,300)	(19,528,082)
Net (decrease) increase in cash, cash equivalents and restricted cash	(131,835,098)	67,363,406
Cash, cash equivalents and restricted cash at beginning of period	366,991,840	320,091,665
Cash, cash equivalents and restricted cash at end of period	235,156,742	387,455,071
Supplemental disclosure of cash flow information:
Interest paid, net of capitalized interest	46,534,262	35,067,228
Income taxes paid	7,951,724	16,866,842
Non-cash investing activities:
Accrual for purchase of equipment and construction included in accrued expenses and other current liabilities	1,794,800	5,825,800
Non-cash financing activities:
Conversion of Series D preferred stock to common stock	$ 97,576,465

Cash, cash equivalents and rest

Cash, cash equivalents and restricted cash - USD ($)	Sep. 30, 2019	Sep. 30, 2018
Cash Cash Equivalents And Restricted Cash
Cash and cash equivalents	$ 10,509,402	$ 51,539,593
Restricted cash	224,647,340	335,915,478
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows	$ 235,156,742	$ 387,455,071

Basis of presentation, signific

Basis of presentation, significant concentrations and risks	9 Months Ended
	Sep. 30, 2019
Basis of presentation, significant concentrations and risks [Abstract]
Basis of presentation and significant concentrations and risks	Note 1 - Basis of presentation, significant concentrations and risks (a) Basis of presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP"). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted as permitted by rules and regulations of the United States Securities and Exchange Commission ("SEC"). The condensed consolidated balance sheet as of December 31, 2018 was derived from the audited consolidated financial statements of China XD Plastics Company Limited ("China XD") and subsidiaries (collectively, the "Company"). The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the consolidated balance sheet of the Company as of December 31, 2018, and the related consolidated statements of comprehensive income, changes in equity and cash flows for the year then ended, included in the Company's Annual Report on Form 10-K filed with the SEC on April 15, 2019. In the opinion of the management, all adjustments (which include normal recurring adjustments) necessary to present a fair statement of the financial position as of September 30, 2019, the results of operations and cash flows for the nine-month periods ended September 30, 2019 and 2018, have been made. The preparation of condensed 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 condensed 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 recoverability of the carrying amounts of property, plant and equipment, the realizability of inventories, the useful lives of property, plant and equipment, the collectability of accounts receivable, the fair values of stock-based compensation awards, the accruals for tax uncertainties and other contingencies, and the discount rate used to determine the present value of the lease payments. The current economic environment has increased the degree of uncertainty inherent in those estimates and assumptions. (b) Accounting pronouncement adopted in 2019 In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842) ("ASU 2016-02"). The new guidance requires the recognition of lease assets and liabilities for operating leases with terms of more than 12 months, in addition to those currently recorded, on the Company’s consolidated balance sheets. Presentation of leases within the consolidated statements of comprehensive income and consolidated statements of cash flows will be generally consistent with the current lease accounting guidance. The Company has adopted this ASU on January 1, 2019 using a modified retrospective approach by recognizing a cumulative-effect adjustment to the opening balance of retained earnings. This adoption approach resulted in a balance sheet presentation that was not be comparable to the prior period in the first year of adoption. Additionally, the Company used the package of practical expedients that allowed the Company to not reassess: (1) whether any expired or existing contracts are or contain leases, (2) lease classification for any expired or existing leases and (3) initial direct costs for any expired or existing leases. The Company also elected the hindsight practical expedient to determine the reasonably certain lease term for existing leases. The adoption of the standard resulted in recognition of right-of-use (“ROU”) assets and lease liabilities of approximately US$16.1 million and US$16.8 million, respectively, as of January 1, 2019. The difference between the initial operating right-of-use asset and operating lease liability of US$0.7 million was accrued rent previously recognized under ASC 840. There was no cumulative effect on retained earnings as of January 1, 2019 as a result of adoption. In February 2018, the FASB issued ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (“ASU 2018-02”). The new guidance allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act and will improve the usefulness of information reported to financial statement users. The Company has adopted the standard on January 1, 2019, and there was no material impact on its consolidated financial statements as a result of the adoption. In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting (“ASU 2018-07”). The new guidance largely aligns the accounting for share-based awards issued to employees and nonemployees. Existing guidance for employee awards will apply to non-employee share-based transactions with limited exceptions. The new guidance also clarifies that any share based payment awards issued to customers should be evaluated under ASC 606, Revenue from Contracts with Customers. The Company has adopted the standard on January 1, 2019, and there was no material impact on its consolidated financial statements as a result of the adoption. (c) Significant concentrations and risks Sales concentration The Company sells its products primarily through approved distributors in the People's Republic of China (the "PRC"). The Company's sales are highly concentrated. Sales to distributors individually exceeded 10% of the Company's revenues for the three-month and nine-month periods ended September 30, 2019 and 2018, are as follows: Three-Month Period Ended September 30, 2019 2018 US$ % US$ % Distributor A, located in PRC 48,354,258 13.0 % 43,675,493 14.8 % Distributor B, located in PRC 41,236,907 11.1 % 38,087,744 12.8 % Distributor C, located in PRC 31,224,911 8.4 % 34,620,819 11.6 % Total 120,816,076 32.5 % 116,384,056 39.2 % Nine-Month Period Ended September 30, 2019 2018 US$ % US$ % Distributor A, located in PRC 163,355,649 14.4 % 136,172,680 14.7 % Distributor B, located in PRC 115,842,572 10.2 % 114,870,175 12.4 % Distributor C, located in PRC 86,271,299 7.6 % 105,340,424 11.4 % Total 365,469,520 32.2 % 356,383,279 38.5 % The Company expects revenues from these distributors to continue to represent a substantial portion of its revenue in the future. Any factor adversely affecting the automobile industry in the PRC or the business operations of these customers will have a material effect on the Company's business, financial position and results of operations. Purchase concentration of raw materials and equipment The principal raw materials used for the Company's production of modified plastics products are plastic resins, such as polypropylene, ABS and nylon. The Company purchases substantially all of its raw materials through a limited number of distributors. Raw material purchases from these distributors, which individually exceeded 10% of the Company's total raw material purchases, accounted for approximately 31.6% (three distributors) and 43.2% (four distributors) for the three-month periods ended September 30, 2019 and 2018, respectively, and 32.6% (three distributors) and 20.4% (two distributors) of the Company's total raw materials purchases for the nine-month periods ended September 30, 2019 and 2018, respectively. Management believes that other suppliers could provide similar raw materials on comparable terms. A change in suppliers, however, could cause a delay in manufacturing and a possible loss of sales, which would adversely affect the Company's business, financial position and results of operations. Cash concentration Cash and cash equivalents and short-term restricted cash mentioned below maintained at banks consist of the following: September 30, 2019 December 31, 2018 US$ US$ Renminbi (“RMB”) denominated bank deposits with: Financial Institutions in the PRC 235,011,468 366,773,172 Financial Institutions in Hong Kong Special Administrative Region ("Hong Kong SAR") — 8,134 United States (“U.S.”) dollar denominated bank deposits with: Financial Institution in the U.S. 16,730 40,390 Financial Institutions in the PRC 16,930 17,050 Financial Institution in Hong Kong SAR 78,930 131,892 Financial Institution in Macau Special Administrative Region ("Macau SAR") 910 6,144 Financial Institution in Dubai, UAE 3,518 14,464 Hong Kong dollar denominated bank deposits with: Financial institution in Hong Kong SAR 8,290 156 Dirham denominated bank deposits with: Financial institution in Dubai, UAE 19,966 438 The bank deposits with financial institutions in the PRC are insured by the government authority for up to RMB500,000. The bank deposits with financial institutions in the Hong Kong SAR are insured by the government authority for up to HK$500,000. The bank deposits with financial institutions in the Macau SAR are insured by the government authority for up to MOP$500,000. The bank deposits with financial institutions in the Dubai, UAE are not insured by the government authority. Total bank deposits amounting to US$1,372,734 and US$1,442,481 were insured as of September 30, 2019 and December 31, 2018, respectively. The Company has not experienced any losses in uninsured bank deposits and does not believe that it is exposed to any significant risks on cash held in bank accounts. To limit exposure to credit risk, the Company primarily places bank deposits with large financial institutions in the PRC, Hong Kong SAR, Macau SAR and Dubai, UAE with acceptable credit rating. Cash deposits in bank that are restricted as to withdrawal or usage for up to 12 months are reported as restricted cash in the consolidated balance sheets. Short-term bank deposits that are pledged as collateral for bills payable relating to purchases of raw materials are reported as restricted cash and amounted to US$129,879,525 and US$202,568,664 as of September 30, 2019 and December 31, 2018, respectively. Upon maturity and repayment of the bills payable, which is generally within 6 months, the cash becomes available for use by the Company. Short-term bank deposits that are related to government grant are reported as restricted cash and amounted to US$1,430,537 and US$1,469,935 as of September 30, 2019 and December 31, 2018, respectively. Short-term bank deposits that are pledged as collateral for issuance of letter of guarantee are reported as restricted cash amounted to US$42,575,237 and US$70,885,301 as of September 30, 2019 and December 31, 2018, respectively. Short-term bank deposits that are pledged as repayment to settle US$45.0 million of syndicated loans obtained from Standard Chartered Bank are reported as restricted cash and amounted to US$49,348,194 and US$50,766,123 as of September 30, 2019 and December 31, 2018, respectively. Short-term bank deposits that are pledged as collateral to settle US$14.9 million of short-term bank loans obtained from Postal Savings Bank of China are reported as restricted cash and amounted to US$1,413,847 and nil as of September 30, 2019 and December 31, 2018, respectively.

Accounts receivable

Accounts receivable	9 Months Ended
	Sep. 30, 2019
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Accounts receivable	Note 2 – Accounts receivable Accounts receivable consists of the following: September 30, 2019 December 31, 2018 US$ US$ Accounts receivable 326,868,747 294,726,804 Allowance for doubtful accounts (37,374 ) (38,516 ) Accounts receivable, net 326,831,373 294,688,288 As of September 30, 2019 and December 31, 2018, the accounts receivable balances also include notes receivable in the amount of US$335,142 and US$27,392, respectively. As of September 30, 2019 and December 31, 2018, US$37,431,712 and US$94,581,170 , There was no accrual of additional provision or write-off of accounts receivable for the three-month and nine-month periods ended September 30, 2019 and 2018. The following table provides an analysis of the aging of accounts receivable as of September 30, 2019 and December 31, 2018: September 30, 2019 December 31, 2018 US$ US$ Aging: – current 270,927,987 218,458,862 – 1-3 months past due 34,349,372 31,386,341 – 4-6 months past due 5,753,489 109,412 – 7-12 months past due 15,124,228 42,532,170 – greater than one year past due 713,671 2,240,019 Total accounts receivable 326,868,747 294,726,804

Inventories

Inventories	9 Months Ended
	Sep. 30, 2019
Inventory, Net [Abstract]
Inventories	Note 3 – Inventories Inventories consist of the following: September 30, 2019 December 31, 2018 US$ US$ Raw materials and work in progress 690,531,879 612,701,274 Finished goods 8,470,679 7,331,921 Total inventories 699,002,558 620,033,195 There were no write down of inventories for the three-month and nine-month periods ended September 30, 2019 and 2018.

Prepaid expenses and other curr

Prepaid expenses and other current assets	9 Months Ended
	Sep. 30, 2019
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid expenses and other current assets	Note 4 – Prepaid expenses and other current assets Prepaid expenses and other current assets consist of the following: September 30, 2019 December 31, 2018 US$ US$ Value added taxes receivables (i) 1,911,502 4,700,702 Advances to suppliers (ii) 131,089,782 104,469,023 Interest receivable (iii) 939,962 826,729 Consideration for sales of Shanghai Sales (iv) - 7,285,231 Receivables from Hong Kong Grand Royal Trading Co., Ltd.(v) 42,566,949 - Receivables from Harbin Xinda High-Tech Co., Ltd. (vi) 50,096,218 - Others (vii) 7,903,006 14,936,843 Total prepaid expenses and other current assets 234,507,419 132,218,528 (i) Value added taxes receivables mainly represent the input taxes on purchasing equipment by Heilongjiang Xinda Enterprise Group Company Limited (“HLJ Xinda Group”) and Sichuan Xinda Enterprise Group Company Limited (“Sichuan Xinda”), which are to be net off with output taxes. Value added taxes receivables were recognized in operating activities in consolidated statements of cash flows. (ii) Advances to suppliers are the advances to purchase raw materials. (iii) Interest receivable mainly represents interest income accrued from restricted cash. (iv) On December 18, 2018, HLJ Xinda Group entered into an agreement with Mr. Xiaohui Gao, General Manager of Heilongjiang Xinda Enterprise Group Shanghai New Materials Sales Company Limited (“Shanghai Sales”), to transfer Shanghai Sales from HLJ Xinda Group to Mr. Gao for a total consideration of RMB50.0 million (equivalent to US$7.3 million). Pursuant to the contract, the Company completed the legal transfer on December 19, 2018 and the full consideration of US$7.3 million was received on April 11, 2019. The cash received was included in the cash flows from investing activities for the nine-month period ended September 30, 2019. (v) Hong Kong Grand Royal Trading Co., Ltd. (“Hong Kong Grand Royal”) is a raw material supplier of Dubai Xinda. Dubai Xinda has prepaid US$48.2 million to Hong Kong Grand Royal in 2017 for purchase of raw materials. Due to the price fluctuation of raw materials, Hong Kong Grand Royal could not purchase and deliver the raw materials to Dubai Xinda. In July 2019, both parties entered into a supplemental agreement to cancel the original purchase agreements and Hong Kong Grand Royal shall refund US$14.0 million by September 30, 2019 and US$34.2 million by October 30, 2019. As of September 30, 2019, Hong Kong Grand Royal has refunded US$5.6 million. On October 25, 2019, both parties entered into another supplemental agreement, pursuant to which, the remaining refund shall be paid by December 30, 2019. (vi) During the nine-month period ended September 30, 2019, the Company transferred US$50.1 million to Harbin Xinda High-Tech Co., Ltd. The amount was subsequently settled in November 2019. (vii) Others mainly include prepaid miscellaneous service fee and staff advance.

Property, plant and equipment,

Property, plant and equipment, net	9 Months Ended
	Sep. 30, 2019
Property, Plant and Equipment [Abstract]
Property, plant and equipment, net	Note 5 – Property, plant and equipment, net Property, plant and equipment consist of the following: September 30, 2019 December 31, 2018 US$ US$ Machinery, equipment and furniture 570,806,401 580,735,482 Motor vehicles 2,270,465 2,658,487 Workshops and buildings 154,524,398 157,976,839 Construction in progress 292,003,986 217,194,285 Total property, plant and equipment 1,019,605,250 958,565,093 Less accumulated depreciation (221,499,762 ) (182,623,813 ) Property, plant and equipment, net 798,105,488 775,941,280 For the three-month and nine-month periods ended September 30, 2019 and 2018, the Company capitalized US$1,581,827 and US$568,444, and US$2,326,326 and US$1,829,388 of interest costs as a component of the cost of construction in progress. Depreciation expense on property, plant and equipment was allocated to the following expense items: Three-Month Period Ended September 30, 2019 2018 US$ US$ Cost of revenues 13,251,745 9,219,288 General and administrative expenses 524,249 804,011 Research and development expenses 887,462 978,117 Selling expenses 1,107 1,332 Total depreciation expense 14,664,563 11,002,748 Nine-Month Period Ended September 30, 2019 2018 US$ US$ Cost of revenues 40,232,815 28,098,227 General and administrative expenses 1,730,020 2,405,381 Research and development expenses 2,855,749 2,954,445 Selling expenses 3,384 4,162 Total depreciation expense 44,821,968 33,462,215

Prepayments to equipment and co

Prepayments to equipment and construction suppliers	9 Months Ended
	Sep. 30, 2019
Prepayments to equipment suppliers [Abstract]
Prepayments to equipment suppliers	Note 6 - Prepayments to equipment and construction suppliers September 30, 2019 December 31, 2018 US$ US$ Hailezi (i) 412,405,158 502,087,116 Green River (ii) — 15,778,057 Beijin Construction (iii) 6,670,735 6,867,269 Peaceful Treasure Limited(iv) 16,860,609 4,936,983 Others 390,460 966,894 Total Prepayments to equipment and construction suppliers 436,326,962 530,636,319 (i) On September 26, 2016 and February 28, 2017, HLJ Xinda Group entered into equipment purchase contracts with Hailezi for a total consideration of RMB782.2 million (equivalent to US$110.6 million) to purchase storage facility and other equipment, which will be used for upgrading the storage system of warehouse located in Harbin, China. Pursuant to the contract with Hailezi, HLJ Xinda Group prepaid RMB621.6 million (equivalent to US$87.9 million) during the first quarter of 2017. Due to a redesign of outdoor storage facility in June 2017, HLJ Xinda Group entered into a supplementary agreement with Hailezi, which decreased the original contract amount to RMB283.7 million (equivalent to US$40.1 million). Hailezi refunded RMB369.1 million (equivalent to US$52.2 million) to HLJ Xinda Group on June 22, 2017. In May 2019, HLJ Xinda Group has prepaid another RMB1.0 million (equivalent to US$0.1 million). As of September 30, 2019, HLJ Xinda Group has prepaid RMB253.5 million (equivalent to US$35.8 million). On July 21, 2017, HLJ Xinda Group entered into three investment agreements with the Management Committee of Harbin Economic- Technological Development Zone with respect to the industrial project for 300,000 metric tons of biological composite materials, the industrial project for upgrading existing equipment for 100,000 metric tons of engineering plastics and the industrial project for a 3D printing intelligent manufacture demonstration factory and a 3D printing display and experience cloud factory (the "HLJ Project"). In order to fulfill the agreements, HLJ Xinda Group entered into an equipment purchase contract with Hailezi to purchase production equipment in November 2017, which will be used for 100,000 metric tons of engineering plastics located in Harbin, for a consideration of RMB939.7 million (equivalent to US$132.9million). Pursuant to the contract with Hailezi, HLJ Xinda Group has prepaid RMB920.9 million (equivalent to US$130.2 million) in total as of June 30, 2019. RMB530.8 million (equivalent to US$75.0 million) of the equipment was delivered in June 2019 and the prepayment was transferred to construction in progress. As of September 30, 2019, the amount of the remaining prepayment was RMB390.1 million (equivalent to US$55.2 million). In connection with the HLJ project, in June and July 2018, HLJ Xinda Group entered into two equipment purchase contracts with Hailezi to purchase production equipment, which will be used for 300,000 metric tons of biological based composite material, located in Harbin, for a consideration of RMB1,906.8 million (equivalent to US$269.6 million). Pursuant to the contracts with Hailezi, HLJ Xinda Group has prepaid RMB541.5 million (equivalent to US$76.6 million) as of September 30, 2019. On March 17, 2017, Sichuan Xinda entered into a definitive agreement with the People's Government of Shunqing District, Nanchong City of Sichuan Province for the production of 300,000 metric tons of bio-composite materials and additive manufacturing and 20,000 metric tons of functional masterbatch, a high-end color additive process in plastics manufacturing (the "Nanchong Project"). The Nanchong Project will be located in a land area of 250 mu (equivalent to 41.2 acres), with 215 mu designated for bio-composite materials and additive manufacturing production and 35 mu to be designated for functional masterbatch production. The projected total capital expenditures for the project is approximately RMB2.5 billion (equivalent to US$353.5 million). In connection with the Nanchong Project, Sichuan Xinda entered into equipment purchase contracts with Hailezi to purchase production equipment and testing equipment. Pursuant to the contracts with Hailezi, Sichuan Xinda prepaid RMB1,728.9 million (equivalent to US$244.4 million) in the first quarter of year 2017. In 2017, in order to ensure the traceability of the product and management of supply chain, Sichuan Xinda expected to launch an integrated ERP system, which resulted in the equipment to be purchased under the original contracts with Hailezi not meeting the production requirements. Hailezi agreed to refund the prepayment in the amount of RMB1,704.9 million (equivalent to US$241.0 million) by the end of March 2018, the remaining uncancelled amount is RMB24.0 million (equivalent to US$3.4 million). As of December 31, 2017, Sichuan Xinda signed a supplementary agreement with Hailezi, pursuant to the agreement, Sichuan Xinda agreed to pay RMB12.4 million (equivalent to US$1.8 million) to Hailezi for the compensation of Hailezi due to the termination of the purchase contracts. In January 2018, Hailezi refunded the above-mentioned prepayment. The Company received the testing equipment in the amount of RMB3.2 million (equivalent to US$0.5 million) in November 2018, the remaining balance of the uncancelled prepayment as of September 30, 2019 was RMB20.8 million (equivalent to US$3.0 million). In connection with the Nanchong Project, on June 21, 2018, Sichuan Xinda entered into another equipment purchase contract with Hailezi to purchase production equipment and testing equipment for a consideration of RMB1,900.1 million (equivalent to US$268.7 million). Pursuant to the contracts with Hailezi, Sichuan Xinda has prepaid RMB1,710.1 million (equivalent to US$241.8 million) as of September 30, 2019. The table below summarized the balance of prepayments to Hailezi for each of the projects as of September 30, 2019 and December 31, 2018, and the movements of the prepayments: (in millions US$) Year Projects Balance as of December 31, 2018 Prepaid in 2019 Transfer to CIP in 2019 Effect of foreign currency exchange rate changes Balance as of September 30, 2019 2017 Storage system 36.8 0.1 — (1.1 ) 35.8 2017 HLJ project 134.2 — (75.0 ) (4.0 ) 55.2 2018 HLJ project 78.9 — — (2.3 ) 76.6 2017 Nanchong project 3.0 — — — 3.0 2018 Nanchong project 249.2 — — (7.4 ) 241.8 Total 502.1 0.1 (75.0 ) (14.8 ) 412.4 (ii) In December 2017, HLJ Xinda Group entered into a building purchase contract with Shanghai Caohejing Kangqiao Science & Green River Construction & Development Co., Ltd. for a total consideration of RMB216.6 million (equivalent to US$31.6 million), with a total area of 13,972.64 square meters with a prepaid RMB108.3 million (equivalent to US$15.8 million). During the six-month period ended June 30, 2019, HLJ Xinda Group entered into an agreement with Green River and Shanghai Sales, to transfer the rights and obligations of HLJ Xinda Group under the original purchase agreement to Shanghai Sales. Pursuant to the agreement, Shanghai Sales shall pay the RMB108.3 million (equivalent to US$15.8 million) to HLJ Xinda Group. As a result, the prepayment was reclassified as prepaid expenses and other current assets during the six-month period ended June 30, 2019. HLJ Xinda Group received the RMB108.3 million on August 6, 2019, which was included in the cash flows from investing activities for the nine-month period ended September 30, 2019. (iii) Since November 15, 2016, Sichuan Xinda entered into decoration contracts with Sichuan Beijin Construction Engineering Company Limited ("Beijin Construction") to perform indoor and outdoor decoration work for a consideration of RMB264.3 million (equivalent to US$37.4 million). Pursuant to the contracts with Beijin Construction, Sichuan Xinda has prepaid RMB120.9 million (equivalent to US$17.1 million) as of September 30, 2019, of which RMB74.0 million (equivalent to US$10.4 million) was transferred to construction in progress. (iv) On October 20, 2016, Sichuan Xinda entered into an equipment purchase contract with Peaceful Treasure Limited ("Peaceful") for a total consideration of RMB89.8 million (equivalent to US$12.7 million) to purchase certain production and testing equipment. The Company prepaid RMB33.9 million (equivalent to US$4.8 million) as of September 30, 2019. On May 31, 2019, Dubai Xinda entered into an equipment purchase contract with Peaceful for a total consideration of US$18.8 million to purchase storage and testing equipment. The Company prepaid US$12.1 million as of September 30, 2019.

Losses on foreign currency opti

Losses on foreign currency option contracts	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Losses on foreign currency option contracts	Note 7 – Losses on foreign currency option contracts On February 24, 2017, the Company entered into two foreign currency option contracts with Bank of China ("BOC"), Harbin Branch, pursuant to which the Company and BOC both have options to excise the foreign currency contracts depending on the future currency fluctuation, and the nominal values are US$5.0 million and US$10.0 million, respectively, with the defined exchange rates for settlement on March 15, 2018. The Company recognized losses on the above foreign currency option contracts amounting to US$0.5 million in the nine-month period ended September 30, 2018.

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Borrowings	Note 8 – Borrowings The Company has credit facilities with several banks under which they draw short-term and long-term bank loans as described below. (a) Current September 30, December 31, 2019 2018 US$ US$ Unsecured loans 310,183,942 418,198,508 Loans secured by accounts receivable 63,623,125 65,567,082 Loans secured by restricted cash 59,138,472 69,500,000 Current portion of long-term bank loans (note b) 186,577,210 176,401,330 Total short-term loans, including current portion of long-term bank loans 619,522,749 729,666,920 As of September 30, 2019 and December 31, 2018, the Company's short-term bank loans (including the current portion of long-term bank loans) bear a weighted average interest rate of 4.8% and 4.7% per annum, respectively. All short-term bank loans mature at various times within one year and contain no renewal terms. During the nine-month period ended September 30, 2019, the Company repaid thirteen loans in a total amount of RMB450.0 million (equivalent to US$63.6 million), and obtained thirteen loans in a total amount of RMB450.0 million (equivalent to US$63.6 million) at an annual interest rate of 4.350% secured by accounts receivables of RMB264.8 million (equivalent to US$37.4 million). In July 2017, the Company obtained a one-year secured loan of US$14.0 million from Bank of China (Paris Branch) at an annual interest rate of 2.5%. The loan was secured by restricted cash of RMB107.0 million (equivalent to US$15.6 million) in Bank of China in Harbin, China. In accordance with the renewal agreement on July 19, 2018, the repayment term of the loan was extended and the loan was repaid in April 2019. In October 2017, the Company obtained a one-year secured loan of US$5.0 million from Bank of China (Paris Branch) at an annual interest rate of 2.5%. The loan was secured by restricted cash of RMB37.5 million (equivalent to US$5.5 million) in Bank of China in Harbin, China. In accordance with the renewal agreement on July 19, 2018, the repayment term of the loan was extended and the loan was repaid in April 2019. In October 2017, the Company obtained a one-year secured loan of US$5.5 million from Bank of China (Paris Branch) at an annual interest rate of 2.5%. The loan was secured by restricted cash of RMB42.0 million (equivalent to US$6.1 million) in Bank of China in Harbin, China. In accordance with the renewal agreement on July 19, 2018, the repayment term of the loan was extended and the loan was repaid in April 2019. In May 2018, the Company obtained a three-month secured short-term loan of US$45.0 million from Standard Chartered Bank with the interest rate at 1.5% per annum over LIBOR payable on the last day of its interest period. The loan was secured by restricted cash of RMB300.0 million (equivalent to US$42.6 million) in Standard Chartered Bank in Harbin, China. The Company did not repay the loan on time which is due on August 17, 2018 due to the stricter foreign exchange control in the PRC. In accordance with the renewal agreements dated October 30, 2019, the repayment term of the loan was extended and the loan will be due on November 29, 2019. The loan will be repaid when the Company receive the US$135.0 million loan from the consortium of banks and financial institutions led by Industrial and Commercial Bank of China (Macau) Limited pursuant to the facility agreement dated October 2, 2019, details please refer to Note 22. In January 2019, the Company obtained a nine-month secured short-term loan of RMB100.0 million (equivalent to US$14.1 million) from Postal Savings Bank of China at an annual interest rate of 4.35%. The loan was secured by restricted cash of RMB10.0 million (equivalent to US$1.4 million) in Postal Savings Bank of China. (b) Non-current September 30, 2019 December 31, 2018 US$ US$ Secured loans 72,652,556 2,177,985 Unsecured loans 300,443,100 196,031,589 Syndicate loan facility 90,000,000 90,000,000 Less: current portion (186,577,210 ) (176,401,330 ) Total long-term bank loans, excluding current portion 276,518,446 111,808,244 In October and November 2015, the Company obtained three long term unsecured loans of RMB260.0 million (equivalent to US$36.8 million) from Bank of China at an annual interest rate of 4.75%. In January 2016, the Company obtained a long term unsecured loan of RMB80.0 million (equivalent to US$11.3 million) from Bank of China at an annual interest rate of 4.75%. On December 9, 2016, the Company obtained a long term unsecured loan of RMB30.0 million (equivalent to US$4.2 million) from Bank of China at an annual interest rate of 4.75%. On March 23, 2017, the Company obtained a long term unsecured loan of RMB25.0 million (equivalent to US$3.5 million) from Bank of China at an annual interest rate of 4.75%. The Company repaid RMB175.0 million (equivalent to US$24.7 million) during 2017 and 2018, and RMB25.0 million (equivalent to US$3.5 million) on April 28, 2019. RMB100.0 million (equivalent to US$14.1 million), RMB20.0 million (equivalent to US$2.8 million), and RMB75.0 million (equivalent to US$10.6 million) will be repaid on October 28, 2019, April 28, 2020 and October 28, 2020, respectively. As of September 30, 2019, the Company was providing external guarantees without the bank’s consent, which was in violation of a provision of the loan contract. According to the loan contract, Bank of China has the right to declare the above loans be immediately due and payable. As a result, the loan amounting to RMB75.0 million (equivalent to US$10.6 million) due on October 28, 2020 was callable and classified as short-term loans. For details of the guarantee, please refer to note 18. On August 22, 2016, Xinda Holding (HK) Company Limited ("Xinda Holding (HK)") a wholly owned subsidiary of the Company, entered into a facility agreement for a loan facility in an aggregate amount of US$180.0 million with a consortium of banks and financial institutions led by Standard Chartered Bank (Hong Kong) Limited. The Company repaid US$90.0 million in 2017 and 2018. US$90.0 million of the principal amount should be repaid on August 22, 2018. The loans were not repaid on time due to the stricter foreign exchange control in the PRC. As of September 30, 2019, the Company totally pledged RMB349.0 million (equivalent to US$49.3 million) restricted cash to secure the repayment of the above loan. In accordance with the renewal agreements dated October 30, 2019, the repayment term of the loan was extended and the loan will be due on November 29, 2019. The loan will be repaid when the Company receive the US$135.0 million loan from the consortium of banks and financial institutions led by Industrial and Commercial Bank of China (Macau) Limited pursuant to the facility agreement dated October 2, 2019, details please refer to Note 22. During 2017, the Company obtained four long-term unsecured loans of RMB430.0 million (equivalent to US$60.8 million) from Nanchong Shuntou Development Group Co., Ltd. at an annual interest rate of 4.35%. In accordance with the renewal agreements on April 2, 2019, the repayment terms of the four loans were extended and the loans would be due on September 30, 2019. As of September 30, 2019, the loans were due and repayment terms have not been extended. The Company is currently negotiating with Nanchong Shuntou Development Group Co., Ltd for the extension. On December 1, 2017, the Company obtained a seven-year unsecured loan of RMB526.3 million (equivalent to US$74.4 million) from Longjiang Bank, Harbin Branch at an annual interest rate of 4.9%. The Company borrowed another long-term loan in amount of RMB169.1 million (equivalent to US$23.9 million) in January 2018 at an annual interest rate of 4.9%. The Company repaid RMB15.0 million (equivalent to US$2.1 million) on June 30, 2019. RMB20.0 million (equivalent to US$2.8 million), RMB35.0 million (equivalent to US$5.0 million), RMB35.0 million (equivalent to US$5.0 million), RMB70.0 million (equivalent to US$9.9 million), RMB70.0 million (equivalent to US$9.9 million), RMB90.0 million (equivalent to US$12.7 million), RMB90.0 million (equivalent to US$12.7 million) and RMB270.4 million (equivalent to US$38.2 million) will be repaid on December 30, 2019, June 30, 2020, December 30, 2020, June 30, 2021, December 30, 2021, June 30, 2022, December 30, 2022 and after 2022, respectively. On June 17, 2019, the Company obtained a long-term loan of RMB600.0 million (equivalent to US$84.8 million) from Longjiang Bank, Harbin Branch at an annual interest rate of 5.635%. RMB100.0 million (equivalent to US$14.2 million), RMB100.0 million (equivalent to US$14.2 million), RMB200.0 million (equivalent to US$28.2 million), RMB200.0 million (equivalent to US$28.2 million), will be repaid in 2021, 2022, 2023, and 2024, respectively. In September 2019, the Company obtained another long-term loan of RMB219.6 million (equivalent to US$31.1 million) from Longjiang Bank, Harbin Branch at an annual interest rate of 5.635%, and the loan will be repaid in 2025. On December 26, 2018, the Company obtained a five-year secured loan of AED8.0 million (equivalent to US$2.2 million) from National Bank of Umm Al Qaiwain at an interest rate of three-month EBOR (2.35% as of September 30, 2019) plus 3.75%. The long-term loan was secured by an undated cheque of AED8.8 million (equivalent to US$2.4 million) favouring the bank provided by Dubai Xinda. The cheque would not be cashed by the bank unless Dubai Xinda defaults. Principal will be repaid in ten half-yearly installments of AED0.8 million (equivalent to US$0.2 million) each. The Company repaid AED0.8 million (equivalent to US$0.2 million) on June 30, 2019. In January 2019, the Company obtained a two-year secured loan of RMB500.0 million (equivalent to US$70.7 million) from China Construction Bank. The long-term loan was secured by the right of equity income of Sichuan Xinda, which was previously held by the Company. The registration of pledge was completed in January 2019. Maturities on long-term bank loans (including current portion) are as follows: September 30, 2019 US$ 2019 181,410,945 2020 10,332,528 2021 105,060,291 2022 40,023,319 After 2022 126,268,573 Total 463,095,656

Accrued expenses and other curr

Accrued expenses and other current liabilities	9 Months Ended
	Sep. 30, 2019
Accrued Liabilities, Current [Abstract]
Accrued expenses and other current liabilities	Note 9 – Accrued expenses and other current liabilities Accrued expenses and other current liabilities consist of the following: September 30, 2019 December 31, 2018 US$ US$ Payables for purchase of property, plant and equipment 14,038,643 53,059,897 Accrued freight expenses 14,341,777 25,908,990 Accrued interest expenses 10,012,097 8,873,532 Contract liabilities (i) 16,248,016 16,105,245 Non income tax payables 4,617,298 6,425,236 Payables to Macromolecule Composite Materials (ii) 19,422,453 — Others (iii) 19,822,979 16,553,998 Total accrued expenses and other current liabilities 98,503,263 126,926,898 (i) Contract liabilities mainly represent the advance received from customers in the PRC for the finished goods and raw materials purchases as of September 30, 2019. The change in contract liabilities primarily represents the cash received, less amounts recognized as revenues during the period. (ii) As of September 30, 2019, the Company owed Heilongjiang Xinda Macromolecule Composite Materials Company Limited (“Macromolecule Composite Materials”) US$19.4 million, which was subsequently settled in October 2019. (iii) Others mainly represent accrued payroll and employee benefits, accrued audit and consulting fees, electricity fee and other accrued miscellaneous operating expenses.

Related party transactions

Related party transactions	9 Months Ended
	Sep. 30, 2019
Related Party Transactions [Abstract]
Related party transactions	Note 10 – Related Party Transactions The related party transactions are summarized as follows: Three-Month Period Ended September 30, Nine-Month Period Ended September 30, 2019 2018 2019 2018 US$ US$ US$ US$ Transactions with related parties: Revenues resulting from transactions with a related party: Sales to Macromolecule Composite Materials (v) 734,895 — 1,040,485 — Financing transactions with related parties: Investment received in advance from Changmu (i) — — — 75,567,512 Refund of investment received in advance to Changmu (i) — (75,567,512 ) — (75,567,512 ) Proceeds of interest-free advances from Changmu (i) — 3,779,509 — 3,779,509 Interest-free advances from Mr. Jie Han (ii) — 1,162,926 2,920,049 1,162,926 Repayment of interest-free advances from Mr. Jie Han (ii) (116,802 ) — (116,802 ) — Interest-free advances from Mr. Jie Han’s son(ii) 8,760,147 726,830 8,760,147 726,830 Interest-free advances from senior management employee in HLJ Xinda Group and Sichuan Xinda (iii) — 8,587,164 275,234 8,587,164 Repayment of interest-free advances from senior management employees in HLJ Xinda Group and Sichuan Xinda (iii) (292,005 ) — (4,679,484 ) — Interest-free advances from Mr. Qingwei Ma (iv) 4,526,076 — 4,526,076 — Repayment of interest-free advances from Mr. Qingwei Ma (iv) (730,012 ) — (730,012 ) — Interest-free advances from Macromolecule Composite Materials (v) — — 63,488,212 — Repayment of interest-free advances from Macromolecule Composite Materials (v) (2,935,570 ) — (63,017,445 ) — Total financing transactions with related parties 9,211,834 (61,311,083 ) 11,425,975 14,256,429 The related party balances are summarized as follows: September 30, 2019 December 31, 2018 US$ US$ Amounts due to related parties: Mr. Jie Han 12,328,748 9,907,915 Mr. Jie Han’s wife 3,101,479 3,180,965 Mr. Jie Han’s son 9,190,007 728,523 Senior management employees in HLJ Xinda Group and Sichuan Xinda 148,530 4,548,335 Mr. Qingwei Ma 3,676,003 — Total amounts due to related parties 28,444,767 18,365,738 (i) On July 14, 2018, Xinda Holding (HK) entered into a subscription intent agreement with Changmu Investment (Beijing) Company Limited (“Changmu”), a company wholly controlled by Mr. Tiexin Han, the son of Mr. Jie Han, the Chief Executive Officer and Chairman of the Company. Pursuant to the terms of the agreement, HLJ Xinda Group received RMB500.0 million (equivalent to US$75.6 million) from Changmu on June 29, 2018 as deposits in order to subscribe newly authorized registered capital of HLJ Xinda Group subject to further negotiations. Due to the inability to reach agreement on the terms, both parties agreed not to proceed with any definitive agreement. Therefore, HLJ Xinda Group refunded the investment received in advance from Changmu in September 2018. During the nine-month period ended September 30, 2018, the Company also received RMB26.0 million (equivalent to US$3.8 million) from Changmu as interest-free advances. (ii) During the nine-month ended September 30, 2018, the Company received RMB8.0 million (equivalent to US$1.2 million) from Mr. Jie Han, the Chairman of the Company, and RMB5.0 million (equivalent to US$0.7 million) from Mr. Tiexin Han, the son of Mr. Jie Han, as interest-free advances to the Company. During the nine-month period ended September 30, 2019, the Company received another RMB20.0 million (equivalent to US$2.9 million) from Mr. Jie Han as interest-free advances and repaid RMB0.8 million (equivalent to US$0.1 million). As of September 30, 2019, the amounts due to Mr. Jie Han was RMB87.2 million (equivalent to US$12.3 million). During the nine-month period ended September 30, 2019, the Company received another RMB60.0 million (equivalent to US$8.8 million) from Mr. Tiexin Han as interest-free advances. As of September 30, 2019, the amounts due to Mr. Tiexin Han was RMB65.0 million (equivalent to US$9.2 million). (iii) In August 2018, the Company received RMB10.0 million (equivalent to US$1.5 million) each from three senior management employees (Messers Junjie Ma, Yuchong Jia, Guangjun Jiao) of Sichuan Xinda as interest-free advances to Sichuan Xinda. During the nine-month period ended September 30, 2018, the Company also received RMB29.1 million (equivalent to US$4.2 million) from a senior management employee (Mr. Rujun Dai) of HLJ Xinda Group as interest-free advances to HLJ Xinda Group. In April 2019, the Company repaid the RMB30.0 million (equivalent to US$4.4 million) to the senior management employees in Sichuan Xinda. During the nine-month period ended September 30, 2019, the Company received another RMB1.9 million (equivalent to US$0.3 million) from Mr. Rujun Dai and repaid RMB2.0 million (equivalent to US$0.3 million) to Mr. Rujun Dai. As of September 30, 2019, the amounts due to Mr. Rujun Dai was RMB1.1 million (equivalent to US$0.1 million). (iv) During the nine-month period ended September 30, 2019, the Company received RMB31.0 million (equivalent to US$4.5 million) from Qingwei Ma, the Chief Operating Officer of the Company, as interest-free advances to the Company, and repaid RMB5.0 million (equivalent to US$0.7 million). As of September 30, 2019, the amounts due to Mr. Qingwei Ma was RMB26.0 million (equivalent to US$3.7 million). (v) On December 26, 2018, Shanghai Sales set up Heilongjiang Xinda Macromolecule Composite Materials Company Limited. On April 22, 2019, Shanghai Sales transferred 97.5% equity interest in Macromolecule Composite Materials to Harbin Shengtong Engineering Plastics Co. Ltd. ("Harbin Shengtong"). Mr. Xigang Chen, who was the general manager of Sichuan Xinda, is the general manager and also the principal shareholder of Harbin Shengtong. Since Mr. Xigang Chen resigned from Sichuan Xinda on August 5, 2019, Macromolecule Composite Materials was no longer a related party of the Company. During the period from April 22, 2019 through August 5, 2019, the Company sold products to Macromolecule Composite Materials in US$1.0 million. During the period from April 22, 2019 through August 5, 2019, the Company received RMB434.4 million (equivalent to US$63.5 million) of interest-free advances from Macromolecule Composite Materials and repaid RMB431.6 million (equivalent to US$63.0 million).

Income tax

Income tax	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income tax	Note 11– Income tax Pursuant to an approval from the local tax authority in July 2013, Sichuan Xinda, a subsidiary of China XD, became a qualified enterprise located in the western region of the PRC, which entitled it to a preferential income tax rate of 15% from January 1, 2013 to December 31, 2020. Under the current laws of Dubai, Dubai Xinda, a subsidiary of China XD, is exempted from income taxes. The effective income tax rates for the nine-month periods ended September 30, 2019 and 2018 were 14.8% and 12.9%, respectively. The effective income tax rate increased from 12.9% for the nine-month period ended September 30, 2018 to 14.8% for the nine-month period ended September 30, 2019, primarily due to the decrease of Sichuan Xinda’s profit before tax (“PBT”) percentage within the consolidating entities. The effective income tax rate for the nine-month period ended September 30, 2019 differs from the PRC statutory income tax rate of 25% primarily due to Sichuan Xinda's preferential income tax rate, the reversal of the unrecognized tax benefits accrued in year 2013 and 75% additional deduction of R&D expenses of the major PRC operating entities. US$3,572,637 previously unrecognized tax benefits accrued in year 2013 and the related accrued interest amounting to US$3,116,216 were reversed due to the expiration of five-year tax assessment period on May 31, 2019. As of September 30, 2019, the unrecognized tax benefits were US$33,663,442 and the interest relating to unrecognized tax benefits was US$12,376,126, of which t he unrecognized tax benefits in year 2014 amounting to US$5,578,390 and related accrued interest amounting to US$4,351,145 were classified as current liabilities as the five-year tax assessment period will expire on May 31, 2020.

Deferred Income

Deferred Income	9 Months Ended
	Sep. 30, 2019
Deferred Revenue Disclosure [Abstract]
Deferred Income	Note 12 – Deferred Income On January 26, 2015, the Company entered into a memorandum and a fund support agreement (the "Agreement") with the People's Government of Shunqing District, Nanchong City, Sichuan Province ("Shunqing Government") pursuant to which Shunqing Government, through its investment vehicle, extended to the Company RMB350 million (equivalent to US$49.5 million) to support the construction of the Sichuan plant, which has been received in full in the form of government repayment of bank loans on behalf of the Company. In addition, the Company has received RMB333.2 million (equivalent to US$47.1 million) from Shunqing Government and RMB6.4 million (equivalent to US$0.9 million) from Ministry of Finance of the People's Republic of China to support the construction and RMB2.2 million (equivalent to US$0.3 million) special funds of ministerial key research projects from Ministry of Science and Technology of PRC as of September 30, 2019. The Company has also received RMB45.0 million (equivalent to US$6.4 million) from Harbin Bureau of Finance for Biomedical composites project as of September 30, 2019. Since the funding is related to the construction of long-term assets, the amounts were recognized as government grant, which is included in deferred income on the consolidated balance sheets, and to be recognized as other income in the consolidated statements of comprehensive income over the periods and in the proportions in which depreciation expense on the long-term assets is recognized. The Sichuan factory has been operational since July 2016. A cumulative RMB97.1 million (equivalent to US$13.8 million) government grants have been amortized as other income proportionate to the depreciation of the related assets, of which RMB25.5 million (equivalent to US$3.6 million) was amortized in the nine-month period ended September 30, 2019. The Company also received RMB36.0 million (equivalent to US$5.1 million) from Shunqing Government with respect to interest subsidy for bank loans. A cumulative RMB16.4 million (equivalent to US$2.3 million) government grants have been amortized as other income in line with the amount of related loan interest accrued.

Other non-current liabilities

Other non-current liabilities	9 Months Ended
	Sep. 30, 2019
Other Liabilities, Noncurrent [Abstract]
Other non-current liabilities	Note 13 – Other non-current liabilities September 30, December 31, 2019 2018 US$ US$ Income tax payable-noncurrent (i) 89,976,096 92,461,068 Deferred income tax liabilities 5,062,698 6,716,921 Others — 2,395,783 Total other non-current liabilities 95,038,794 101,573,772 (i) Income tax payable-noncurrent represents the repatriation tax, the accumulative balance of unrecognized tax benefits since 2015 and related accrued interest. According to the Tax Cuts and Jobs Act enacted on December 22, 2017, the management recognized the amount of U.S. tax corporate income tax is US$70,965,148 based on the deemed repatriation to the United States of accumulated earnings mandated by the U.S. tax reform, US$17,031,636 of which due payable in 2018 and 2019 was classified as current liabilities.

Redeemable Series D convertible

Redeemable Series D convertible preferred stock	9 Months Ended
	Sep. 30, 2019
Dividends, Preferred Stock [Abstract]
Redeemable Series D convertible preferred stock	Note 14 – Redeemable Series D convertible preferred stock On September 26, 2019, the Company delivered an irrevocable notice pursuant to Section 6(C)(ii) of the Amended and Restated Certificate of Designation, Preferences and Rights of Series D Junior Convertible Preferred Stock (the “Certificate of Designation”), to MSPEA Modified Plastics Holding Limited (“MSPEA”), and exercised its right set forth in Section 6(C)(i) of the Certificate of Designation for the mandatory conversion of each outstanding share of the redeemable Series D convertible preferred stock (“Series D Preferred Stock”) into 16,000,000 fully paid and nonassessable shares of common stock. As of September 26, 2019, 16,000,000 shares of Series D Preferred Stock were thus converted into 16,000,000 shares of common stock.

Stockholders' equity

Stockholders' equity	9 Months Ended
	Sep. 30, 2019
Stockholders' Equity Note [Abstract]
Stockholders' equity	Note 15 – Stockholders' equity The changes of each caption of stockholders' equity for the nine-month period ended September 30, 2019 are as follows: Series B Preferred Stock Common Stock Accumulated Number of Shares Amount Number of Shares Amount Treasury Stock Additional Paid-in Capital Retained Earnings Other Comprehensive Loss Total Stockholders' Equity US$ US$ US$ US$ US$ US$ US$ Balance at January 1, 2019 1,000,000 100 50,948,841 5,097 (92,694 ) 86,633,582 717,103,890 (54,732,547 ) 748,917,428 Net income - - - - - - 68,057,245 - 68,057,245 Series D Preferred Stock converted to common stock - - 16,000,000 1,600 - 97,574,865 - - 97,576,465 Other comprehensive income - Foreign currency translation adjustment, net of nil income taxes - - - - - - - (24,732,543 ) (24,732,543 ) Balance as of September 30, 2019 1,000,000 100 66,948,841 6,697 (92,694 ) 184,208,447 785,161,135 (79,465,090 ) 889,818,595

Stock based compensation

Stock based compensation	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract]
Stock based compensation	Note 16– Stock based compensation Non-vested shares The Company recognized nil and US$45,339 of compensation expense in general and administrative expenses relating to non-vested shares for the three-month periods ended September 30, 2019 and 2018, respectively, and nil and US$2,675,115 for the nine-month periods ended September 30, 2019 and 2018, respectively. As of September 30, 2019, there was no unrecognized compensation cost relating to non-vested shares. Stock options The Company recognized nil and US$595,044 of share-based compensation expense in general and administrative expenses relating to stock options for the three-month and nine-month periods ended September 30, 2019 and 2018, respectively.

Earnings per share

Earnings per share	9 Months Ended
	Sep. 30, 2019
Earnings per common share:
Earnings per share	Note 17 - Earnings per share Basic and diluted earnings per share are calculated as follows: Three-Month Period Ended September 30, Nine-Month Period Ended September 30, 2019 2018 2019 2018 US$ US$ US$ US$ Net income 16,965,213 8,964,941 68,057,245 55,288,920 Less: Earnings allocated to participating Series D convertible preferred stock (3,834,137 ) (2,140,971 ) (15,967,004 ) (13,257,752 ) Earnings allocated to participating nonvested shares — (8,904 ) — (106,113 ) Net income for basic and diluted earnings per share 13,131,076 6,815,066 52,090,241 41,925,055 Denominator Denominator for basic earnings per share 51,818,406 50,930,653 51,241,881 50,596,880 Dilutive effect of outstanding share options — 32,944 — 32,944 Denominator for diluted earnings per share 51,818,406 50,963,597 51,241,881 50,629,824 Earnings per share: Basic and diluted 0.25 0.13 1.02 0.83 The following table summarizes potentially dilutive securities excluded from the calculation of diluted earnings per share for the three-month periods and nine-month periods ended September 30, 2019 and 2018 because their effects are anti-dilutive: Three-Month Period Ended September 30, Nine-Month Period Ended September 30, 2019 2018 2019 2018 Shares issuable upon conversion of Series D convertible preferred stock 15,130,435 16,000,000 15,706,960 16,000,000

Commitments and contingencies

Commitments and contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingencies	Note 18 - Commitments and contingencies (1) Sichuan plant construction and equipment purchase. On March 8, 2013, Xinda Holding (HK) entered into an investment agreement with Shunqing Government, pursuant to which Xinda Holding (HK) will invest RMB1,800 million (equivalent to US$254.5 million) in property, plant and equipment and approximately RMB600 million (equivalent to US$84.8 million) in working capital, for the construction of Sichuan plant. As of September 30, 2019, the Company has a remaining commitment of RMB54.8 million (equivalent to US$7.7 million) mainly for facility construction. In September 2016, Sichuan Xinda entered into equipment purchase contracts with Hailezi for a consideration of RMB17.0 million (equivalent to US$2.4 million) to purchase storage facility and testing equipment. Afterward, Sichuan Xinda cancelled two contracts with Hailezi for a consideration of RMB1.6 million (equivalent to US$0.2 million). As of September 30, 2019, Sichuan Xinda prepaid RMB6.0 million (equivalent to US$0.9 million) and has a remaining commitment of RMB9.4 million (equivalent to US$1.3 million). On October 20, 2016, Sichuan Xinda entered into an equipment purchase contract with Peaceful Treasure Limited ("Peaceful") On November 15, 2016, Sichuan Xinda entered into decoration contract with Beijin Construction to perform indoor and outdoor decoration work for a consideration of RMB237.6 million (equivalent to US$33.6 million). On February 20, 2017, Sichuan Xinda entered into another decoration contract with Beijin Construction to perform outdoor decoration work for a consideration of RMB2.9 million (equivalent to US$0.4 million). On June 10, 2017, Sichuan Xinda entered into another decoration contract with Beijin Construction to perform ground decoration work for a consideration of RMB23.8 million (equivalent to US$3.4 million). As of September 30, 2019, Sichuan Xinda prepaid RMB120.9 million (equivalent to US$17.1 million) of which RMB74.0 million (equivalent to US$10.4 million) was transferred to construction in progress and has a remaining commitment of RMB143.4 million (equivalent to US$20.3 million). In connection with the Nanchong Project mentioned in Note 6 (i), Sichuan Xinda entered into equipment purchase contracts with Hailezi for a consideration of RMB2,242.8 million (equivalent to US$317.1 million) to purchase production equipment and testing equipment in March 2017. By the end of June 2017, Sichuan Xinda expected to launch an integrated ERP system, which resulted in the equipment to be purchased under the original contracts with Hailezi not meeting the production requirements. Thus the original contracts have been terminated with the amount of RMB2,222.9 million (equivalent to US$314.3 million), and Hailezi agreed to refund the prepayment in the amount of RMB1,704.9 million (equivalent to US$241.0 million) by the end of March 2018, out of the total prepayment made by Sichuan Xinda of RMB1,722.9 million (equivalent to US$243.5 million). As of June 30, 2018, Hailezi has refunded the prepayment in the amount of RMB1,704.9 million (equivalent to US$241.0 million). As of September 30, 2019, Sichuan Xinda prepaid RMB18.0 million (equivalent to US$2.5 million) and has a remaining commitment of RMB1.9 million (equivalent to US$0.3 million). In connection with the Nanchong Project, on June 21, 2018, Sichuan Xinda entered into another equipment purchase contracts with Hailezi to purchase production equipment and testing equipment for a consideration of RMB1,900.1 million (equivalent to US$268.7 million). Pursuant to the contracts with Hailezi, Sichuan Xinda has prepaid RMB1,710.1 million (equivalent to US$241.8 million) as of September 30, 2019, and has a remaining commitment of RMB190.0 million (equivalent to US$26.9 million). (2) Heilongjiang plant construction and equipment purchase In connection with the equipment purchase contracts with Hailezi signed on September 26, 2016 and February 28, 2017 mentioned in Note 6 (i), HLJ Xinda Group has a remaining commitment of RMB30.2 million (equivalent to US$4.3 million) as of September 30, 2019. In connection with the "HLJ Project" mentioned in Note 6 (i), pursuant to the three investment agreements, the project total capital expenditure will be RMB4,015.0 million (equivalent to be US$567.7 million), among which the investment in fixed assets shall be no less than RMB3,295.0 million (equivalent to US$465.9 million) in total. Pursuant to the contracts with Hailezi signed in November 2017 mentioned in Note 6 (i), HLJ Xinda Group has a remaining commitment of RMB18.8 million (equivalent to US$2.7 million) as of September 30, 2019. In connection with the HLJ project, on June 25, 2018, HLJ Xinda Group entered into another equipment purchase contract with Hailezi to purchase production equipment, which will be used for 300,000 metric tons of biological based composite material, located in Harbin, for a consideration of RMB749.8 million (equivalent to US$106.0 million). Pursuant to the contract with Hailezi, HLJ Xinda Group has prepaid RMB300.7 million (equivalent to US$42.5 million) as of September 30, 2019, and has a remaining commitment of RMB449.1 million (equivalent to US$63.5 million). In connection with the HLJ Project, on July 12, 2018, HLJ Xinda Group entered into an equipment purchase contract with Hailezi to purchase production equipment, which will be used for 300,000 metric tons of biological based composite material, located in Harbin, for a consideration of RMB1,157.0 million (equivalent to US$163.6 million). Pursuant to the contract with Hailezi, HLJ Xinda has prepaid RMB240.8 million (equivalent to US$34.0 million) as of September 30, 2019, and has a remaining commitment of RMB916.2 million (equivalent to US$129.6 million). (3) Dubai plant construction and equipment On April 28, 2015, Dubai Xinda entered into a warehouse construction contract with Falcon Red Eye Contracting Co. L.L.C. for a total consideration of AED6.7 million (equivalent to US$1.8 million). As of September 30, 2019, the Company has a remaining commitment of AED1.6 million (equivalent to US$0.4 million). On May 31, 2019, Dubai Xinda entered into a warehouse construction contract with Peaceful for a total consideration of US$18.8 million. As of September 30, 2019, the Company has a remaining commitment of US$6.7 million. (4) Xinda CI (Beijing) office building decoration On March 30, 2017, Xinda CI (Beijing) Investment Holding Co., Ltd. ("Xinda Beijing Investment") entered into a decoration contract with Beijing Fangyuan Decoration Engineering Co., Ltd. for a total consideration of RMB5.8 million (equivalent to US$0.8 million) to decorate office building. As of December 31, 2018, the decoration work in the amount of RMB2.0 million (equivalent to US$0.3 million) was recorded in construction in progress. As of September 30, 2019, the Company has a remaining commitment of RMB3.8 million (equivalent to US$0.5 million). On June 9, 2017, Xinda CI (Beijing) entered into a decoration contract with Beijing Zhonghongwufang Stone Co., Ltd for a total consideration of RMB1.2 million (equivalent to US$0.2 million) to decorate office building. As of December 31, 2018, the decoration work in the amount of RMB0.6 million (equivalent to US$0.1 million) was recorded in construction in progress. As of September 30, 2019, the Company has a remaining commitment of RMB0.6 million (equivalent to US$0.1 million). (5) Guarantees On December 25, 2018, HLJ Xinda Group, Sichuan Xinda and Mr. Jie Han provided guarantee to Shanghai Sales obtaining a one-year loan of RMB500.0 million (equivalent to US$70.7) from Longjiang Bank, Harbin Branch with an annual interest rate of 6.09% from December 25, 2018 to December 24, 2019. If Shanghai Sales does not repay the above loan when due, HLJ Xinda Group, Sichuan Xinda and Mr. Jie Han shall be obliged to repay the RMB500.0 million loan. On April 15, 2019, Sichuan Xinda provided guarantee to Shanghai Sales obtaining a one-year loan of RMB800.0 million (equivalent to US$113.1 million) from Longjiang Bank, Harbin Branch with an annual interest rate of 6.09% from April 15, 2019 to April 14, 2020. If Shanghai Sales does not repay the above loan when due, Sichuan Xinda shall be obliged to repay the RMB800.0 million loan. In the event of Shanghai Sales defaults on the loans, the Company’s material loss contingency would be RMB1.379 billion (equivalent to US$195.0 million), including estimated interest expenses of RMB79.2 million (equivalent to US$11.2 million) as of September 30, 2019. As the Company estimated that the potential material loss contingency was not probable, no accrual for a loss contingency was recognized for the nine-month period ended September 30, 2019.

Revenues

Revenues	9 Months Ended
	Sep. 30, 2019
Revenues [Abstract]
Revenues	Note 19 - Revenues Revenues consist of the following: Three-Month Period Ended September 30, Nine-Month Period Ended September 30, 2019 2018 2019 2018 US$ US$ US$ US$ Modified Polyamide 66 (PA66) 120,234,670 72,832,370 296,372,085 242,690,994 Modified Polyamide 6 (PA6) 78,940,503 54,018,912 250,529,646 180,317,333 Plastic Alloy 66,353,485 76,511,378 200,901,936 234,487,071 Modified Polypropylene (PP) 32,666,069 60,923,190 110,518,373 158,280,180 Modified Acrylonitrile Butadiene Styrene (ABS) 12,437,078 6,299,771 40,662,342 23,128,606 Polyoxymethylenes (POM) 2,053,799 2,881,985 6,953,161 7,753,725 Polyphenylene Oxide (PPO) 5,490,232 2,425,361 31,482,628 13,215,599 Polylactide (PLA) 17,525,906 20,854,274 46,789,233 64,583,387 Polyethylene (PE) 4,103,483 — 7,707,560 — Work in progress 33,062,822 — 145,362,837 — Raw materials 291,044 477,499 419,177 550,398 Total Revenue 373,159,091 297,224,740 1,137,698,978 925,007,293 The following table provides sales by major customer group for the three-month and nine-month periods ended September 30, 2019 and 2018 Three-month Period Ended September 30, Nine-month Period Ended September 30, 2019 2018 2019 2018 US$ US$ US$ US$ Distributor 312,919,940 292,507,429 918,602,515 911,068,381 Direct customers 59,948,107 4,239,812 218,677,286 13,388,514 Others 291,044 477,499 419,177 550,398 Total 373,159,091 297,224,740 1,137,698,978 925,007,293

Gains on disposal of a subsidia

Gains on disposal of a subsidiary	9 Months Ended
	Sep. 30, 2019
Discontinued Operations and Disposal Groups [Abstract]
Losses on disposal of a subsidiary	Note 20 - Gains on disposal of a subsidiary On November 13, 2018, HLJ Xinda Group entered into an agreement with Shanghai Sales, to transfer the wholly owned equity of Heilongjiang Xinda Enterprise Group (Shanghai) New Materials Research and Development Co., Ltd. ("Shanghai New Materials R&D") from HLJ Xinda Group to Shanghai Sales with no consideration as a result of group restructuring to streamline resources and improve operating efficiency. The legal transfer was completed on February 1, 2019 and the Company recorded gains of US$0.5 million on disposal of Shanghai New Materials R&D for the nine-month period ended September 30, 2019.

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	Note 21 - Leases As discussed in Note 1, effective January 1, 2019, the Company adopted Topic 842. At the inception of a contract, the Company determines if the arrangement is, or contains, a lease. ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Rent expense is recognized on a straight-line basis over the lease term. The Company has made certain accounting policy elections whereby it does not recognize ROU assets or lease liabilities for short-term leases (those with original terms of 12-months or less). All of the Company’s existing leases as of September 30, 2019 were classified as operating leases. As of September 30, 2019, the Company had operating leases for land and office with remaining terms expiring from 2022 through 2037 and a weighted average remaining lease term of 17.5 years. Weighted average discount rate used in the calculation of the lease liabilities was 6.7%. The discount rate reflects the estimated incremental borrowing rate, which includes an assessment of the credit rating to determine the rate that the Company would have to pay to borrow, on a collateralized basis for a similar term, an amount equal to the lease payments in a similar economic environment. Lease cost for the nine-month period ended September 30, 2019 is as follows: Nine-Month Period Ended September 30, 2019 US$ Operating lease cost 1,271,455 Short-term lease cost 432,124 Total lease cost 1,703,579 Remaining Lease Payments 2019 346,192 2020 1,386,124 2021 1,408,598 2022 1,408,979 2023 1,424,857 Thereafter 22,023,858 Total remaining lease payments 27,998,608 Less: imputed interest (12,094,615 ) Total operating lease liabilities 15,903,993 Less: current portion (1,390,531 ) Non-current operating lease liabilities 14,513,462 Weighted-average remaining lease term 17.5 years Weighted-average discount rate 6.7 % Supplemental cash flow information related to leases is as follows: Nine-Month Period Ended September 30, Supplemental disclosure of cash flow information: 2019 US$ Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases 1,707,618 Right-of-use assets obtained in exchange for new lease liabilities: Operating lease 16,075,213 As previously disclosed in the consolidated financial statement for the year ended December 31, 2018 and under the previous lease standard (Topic 840), future minimum annual lease payments for the years subsequent to December 31, 2018 and in aggregate are as follows: US$ Years ended December 31, 2019 2,174,439 2020 1,486,007 2021 1,486,007 2022 1,446,251 2023 1,482,593 Thereafter 21,176,139 Rental expenses incurred for operating leases of plant and equipment and office spaces were US$2,455,509 in 2018.

Subsequent events

Subsequent events	9 Months Ended
	Sep. 30, 2019
Subsequent Events [Abstract]
Subsequent events	Note 22 - Subsequent Event (i) Xinda Holding (HK) Company Limited, a wholly owned subsidiary of the Company, entered into a facility agreement on October 2, 2019 for a loan facility in an aggregate amount of US$135,000,000 with a consortium of banks and financial institutions led by Industrial and Commercial Bank of China (Macau) Limited. (ii) As a result of the Mandatory Conversion (see Note 14), the term of office of MSPEA’s two designees on the Board, Homer Sun and Ryan Law, was automatically terminated. On October 14, 2019, MSPEA sent a letter (the "Proposal Withdrawal Letter") to the Board informing the Board that it no longer intended to participate in the consortium consisting of XD Engineering Plastics Company Limited, Mr. Han and MSPEA (the “Consortium”) and no longer intended to participate in the going-private transaction (the “Transaction”). Concurrently with sending the Proposal Withdrawal Letter, MSPEA sent a letter (the "Consortium Withdrawal Letter") to the other members of the Consortium informing them that it no longer intended to participate in the Consortium and no longer intended to participate in the Transaction.

Basis of presentation and signi

Basis of presentation and significant concentrations and risks (Policies)	9 Months Ended
	Sep. 30, 2019
Basis of presentation, significant concentrations and risks [Abstract]
Basis of presentation	(a) Basis of presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP"). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted as permitted by rules and regulations of the United States Securities and Exchange Commission ("SEC"). The condensed consolidated balance sheet as of December 31, 2018 was derived from the audited consolidated financial statements of China XD Plastics Company Limited ("China XD") and subsidiaries (collectively, the "Company"). The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the consolidated balance sheet of the Company as of December 31, 2018, and the related consolidated statements of comprehensive income, changes in equity and cash flows for the year then ended, included in the Company's Annual Report on Form 10-K filed with the SEC on April 15, 2019. In the opinion of the management, all adjustments (which include normal recurring adjustments) necessary to present a fair statement of the financial position as of September 30, 2019, the results of operations and cash flows for the nine-month periods ended September 30, 2019 and 2018, have been made. The preparation of condensed 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 condensed 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 recoverability of the carrying amounts of property, plant and equipment, the realizability of inventories, the useful lives of property, plant and equipment, the collectability of accounts receivable, the fair values of stock-based compensation awards, the accruals for tax uncertainties and other contingencies, and the discount rate used to determine the present value of the lease payments. The current economic environment has increased the degree of uncertainty inherent in those estimates and assumptions.
Accounting Pronouncement Adopted in 2019	(b) Accounting pronouncement adopted in 2019 In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842) ("ASU 2016-02"). The new guidance requires the recognition of lease assets and liabilities for operating leases with terms of more than 12 months, in addition to those currently recorded, on the Company’s consolidated balance sheets. Presentation of leases within the consolidated statements of comprehensive income and consolidated statements of cash flows will be generally consistent with the current lease accounting guidance. The Company has adopted this ASU on January 1, 2019 using a modified retrospective approach by recognizing a cumulative-effect adjustment to the opening balance of retained earnings. This adoption approach resulted in a balance sheet presentation that was not be comparable to the prior period in the first year of adoption. Additionally, the Company used the package of practical expedients that allowed the Company to not reassess: (1) whether any expired or existing contracts are or contain leases, (2) lease classification for any expired or existing leases and (3) initial direct costs for any expired or existing leases. The Company also elected the hindsight practical expedient to determine the reasonably certain lease term for existing leases. The adoption of the standard resulted in recognition of right-of-use (“ROU”) assets and lease liabilities of approximately US$16.1 million and US$16.8 million, respectively, as of January 1, 2019. The difference between the initial operating right-of-use asset and operating lease liability of US$0.7 million was accrued rent previously recognized under ASC 840. There was no cumulative effect on retained earnings as of January 1, 2019 as a result of adoption. In February 2018, the FASB issued ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (“ASU 2018-02”). The new guidance allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act and will improve the usefulness of information reported to financial statement users. The Company has adopted the standard on January 1, 2019, and there was no material impact on its consolidated financial statements as a result of the adoption. In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting (“ASU 2018-07”). The new guidance largely aligns the accounting for share-based awards issued to employees and nonemployees. Existing guidance for employee awards will apply to non-employee share-based transactions with limited exceptions. The new guidance also clarifies that any share based payment awards issued to customers should be evaluated under ASC 606, Revenue from Contracts with Customers. The Company has adopted the standard on January 1, 2019, and there was no material impact on its consolidated financial statements as a result of the adoption.
Significant concentrations and risks	(c) Significant concentrations and risks Sales concentration The Company sells its products primarily through approved distributors in the People's Republic of China (the "PRC"). The Company's sales are highly concentrated. Sales to distributors individually exceeded 10% of the Company's revenues for the three-month and nine-month periods ended September 30, 2019 and 2018, are as follows: Three-Month Period Ended September 30, 2019 2018 US$ % US$ % Distributor A, located in PRC 48,354,258 13.0 % 43,675,493 14.8 % Distributor B, located in PRC 41,236,907 11.1 % 38,087,744 12.8 % Distributor C, located in PRC 31,224,911 8.4 % 34,620,819 11.6 % Total 120,816,076 32.5 % 116,384,056 39.2 % Nine-Month Period Ended September 30, 2019 2018 US$ % US$ % Distributor A, located in PRC 163,355,649 14.4 % 136,172,680 14.7 % Distributor B, located in PRC 115,842,572 10.2 % 114,870,175 12.4 % Distributor C, located in PRC 86,271,299 7.6 % 105,340,424 11.4 % Total 365,469,520 32.2 % 356,383,279 38.5 % The Company expects revenues from these distributors to continue to represent a substantial portion of its revenue in the future. Any factor adversely affecting the automobile industry in the PRC or the business operations of these customers will have a material effect on the Company's business, financial position and results of operations. Purchase concentration of raw materials and equipment The principal raw materials used for the Company's production of modified plastics products are plastic resins, such as polypropylene, ABS and nylon. The Company purchases substantially all of its raw materials through a limited number of distributors. Raw material purchases from these distributors, which individually exceeded 10% of the Company's total raw material purchases, accounted for approximately 31.6% (three distributors) and 43.2% (four distributors) for the three-month periods ended September 30, 2019 and 2018, respectively, and 32.6% (three distributors) and 20.4% (two distributors) of the Company's total raw materials purchases for the nine-month periods ended September 30, 2019 and 2018, respectively. Management believes that other suppliers could provide similar raw materials on comparable terms. A change in suppliers, however, could cause a delay in manufacturing and a possible loss of sales, which would adversely affect the Company's business, financial position and results of operations. Cash concentration Cash and cash equivalents and short-term restricted cash mentioned below maintained at banks consist of the following: September 30, 2019 December 31, 2018 US$ US$ Renminbi (“RMB”) denominated bank deposits with: Financial Institutions in the PRC 235,011,468 366,773,172 Financial Institutions in Hong Kong Special Administrative Region ("Hong Kong SAR") — 8,134 United States (“U.S.”) dollar denominated bank deposits with: Financial Institution in the U.S. 16,730 40,390 Financial Institutions in the PRC 16,930 17,050 Financial Institution in Hong Kong SAR 78,930 131,892 Financial Institution in Macau Special Administrative Region ("Macau SAR") 910 6,144 Financial Institution in Dubai, UAE 3,518 14,464 Hong Kong dollar denominated bank deposits with: Financial institution in Hong Kong SAR 8,290 156 Dirham denominated bank deposits with: Financial institution in Dubai, UAE 19,966 438 The bank deposits with financial institutions in the PRC are insured by the government authority for up to RMB500,000. The bank deposits with financial institutions in the Hong Kong SAR are insured by the government authority for up to HK$500,000. The bank deposits with financial institutions in the Macau SAR are insured by the government authority for up to MOP$500,000. The bank deposits with financial institutions in the Dubai, UAE are not insured by the government authority. Total bank deposits amounting to US$1,372,734 and US$1,442,481 were insured as of September 30, 2019 and December 31, 2018, respectively. The Company has not experienced any losses in uninsured bank deposits and does not believe that it is exposed to any significant risks on cash held in bank accounts. To limit exposure to credit risk, the Company primarily places bank deposits with large financial institutions in the PRC, Hong Kong SAR, Macau SAR and Dubai, UAE with acceptable credit rating. Cash deposits in bank that are restricted as to withdrawal or usage for up to 12 months are reported as restricted cash in the consolidated balance sheets. Short-term bank deposits that are pledged as collateral for bills payable relating to purchases of raw materials are reported as restricted cash and amounted to US$129,879,525 and US$202,568,664 as of September 30, 2019 and December 31, 2018, respectively. Upon maturity and repayment of the bills payable, which is generally within 6 months, the cash becomes available for use by the Company. Short-term bank deposits that are related to government grant are reported as restricted cash and amounted to US$1,430,537 and US$1,469,935 as of September 30, 2019 and December 31, 2018, respectively. Short-term bank deposits that are pledged as collateral for issuance of letter of guarantee are reported as restricted cash amounted to US$42,575,237 and US$70,885,301 as of September 30, 2019 and December 31, 2018, respectively. Short-term bank deposits that are pledged as repayment to settle US$45.0 million of syndicated loans obtained from Standard Chartered Bank are reported as restricted cash and amounted to US$49,348,194 and US$50,766,123 as of September 30, 2019 and December 31, 2018, respectively. Short-term bank deposits that are pledged as collateral to settle US$14.9 million of short-term bank loans obtained from Postal Savings Bank of China are reported as restricted cash and amounted to US$1,413,847 and nil as of September 30, 2019 and December 31, 2018, respectively.

Basis of presentation and sig_2

Basis of presentation and significant concentrations and risks (Tables)	9 Months Ended
	Sep. 30, 2019
Basis of presentation, significant concentrations and risks [Abstract]
Schedule of Sales Concentrations by Major Distributors	The Company sells its products primarily through approved distributors in the People's Republic of China (the "PRC"). The Company's sales are highly concentrated. Sales to distributors individually exceeded 10% of the Company's revenues for the three-month and nine-month periods ended September 30, 2019 and 2018, are as follows: Three-Month Period Ended September 30, 2019 2018 US$ % US$ % Distributor A, located in PRC 48,354,258 13.0 % 43,675,493 14.8 % Distributor B, located in PRC 41,236,907 11.1 % 38,087,744 12.8 % Distributor C, located in PRC 31,224,911 8.4 % 34,620,819 11.6 % Total 120,816,076 32.5 % 116,384,056 39.2 % Nine-Month Period Ended September 30, 2019 2018 US$ % US$ % Distributor A, located in PRC 163,355,649 14.4 % 136,172,680 14.7 % Distributor B, located in PRC 115,842,572 10.2 % 114,870,175 12.4 % Distributor C, located in PRC 86,271,299 7.6 % 105,340,424 11.4 % Total 365,469,520 32.2 % 356,383,279 38.5 %
Schedule of Cash and Cash Equivalents	Cash and cash equivalents and short-term restricted cash mentioned below maintained at banks consist of the following: September 30, 2019 December 31, 2018 US$ US$ Renminbi (“RMB”) denominated bank deposits with: Financial Institutions in the PRC 235,011,468 366,773,172 Financial Institutions in Hong Kong Special Administrative Region ("Hong Kong SAR") — 8,134 United States (“U.S.”) dollar denominated bank deposits with: Financial Institution in the U.S. 16,730 40,390 Financial Institutions in the PRC 16,930 17,050 Financial Institution in Hong Kong SAR 78,930 131,892 Financial Institution in Macau Special Administrative Region ("Macau SAR") 910 6,144 Financial Institution in Dubai, UAE 3,518 14,464 Hong Kong dollar denominated bank deposits with: Financial institution in Hong Kong SAR 8,290 156 Dirham denominated bank deposits with: Financial institution in Dubai, UAE 19,966 438

Accounts receivable (Tables)

Accounts receivable (Tables)	9 Months Ended
	Sep. 30, 2019
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Schedule of Accounts Receivable	Accounts receivable consists of the following: September 30, 2019 December 31, 2018 US$ US$ Accounts receivable 326,868,747 294,726,804 Allowance for doubtful accounts (37,374 ) (38,516 ) Accounts receivable, net 326,831,373 294,688,288
Schedule of Aging of Accounts Receivable	The following table provides an analysis of the aging of accounts receivable as of September 30, 2019 and December 31, 2018: September 30, 2019 December 31, 2018 US$ US$ Aging: – current 270,927,987 218,458,862 – 1-3 months past due 34,349,372 31,386,341 – 4-6 months past due 5,753,489 109,412 – 7-12 months past due 15,124,228 42,532,170 – greater than one year past due 713,671 2,240,019 Total accounts receivable 326,868,747 294,726,804

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2019
Inventory, Net [Abstract]
Schedule of Inventories	Inventories consist of the following: September 30, 2019 December 31, 2018 US$ US$ Raw materials and work in progress 690,531,879 612,701,274 Finished goods 8,470,679 7,331,921 Total inventories 699,002,558 620,033,195

Prepaid expenses and other cu_2

Prepaid expenses and other current assets (Tables)	9 Months Ended
	Sep. 30, 2019
Prepaid Expense and Other Assets, Current [Abstract]
Schedule of Prepaid Expense and Other Assets Current	Prepaid expenses and other current assets consist of the following: September 30, 2019 December 31, 2018 US$ US$ Value added taxes receivables (i) 1,911,502 4,700,702 Advances to suppliers (ii) 131,089,782 104,469,023 Interest receivable (iii) 939,962 826,729 Consideration for sales of Shanghai Sales (iv) - 7,285,231 Receivables from Hong Kong Grand Royal Trading Co., Ltd.(v) 42,566,949 - Receivables from Harbin Xinda High-Tech Co., Ltd. (vi) 50,096,218 - Others (vii) 7,903,006 14,936,843 Total prepaid expenses and other current assets 234,507,419 132,218,528 (i) Value added taxes receivables mainly represent the input taxes on purchasing equipment by Heilongjiang Xinda Enterprise Group Company Limited ("HLJ Xinda Group") and Sichuan Xinda, Enterprise Group Company Limited ("Sichuan Xinda"), which are to be net off with output taxes. Value added taxes receivables were recognized in operating activities in consolidated statements of cash flows. (ii) Advances to suppliers are the advances to purchase raw materials. (iii) Interest receivable mainly represents interest income accrued from restricted cash. (iv) On December 18, 2018, HLJ Xinda Group entered into an agreement with Mr. Xiaohui Gao, General Manager of Heilongjiang Xinda Enterprise Group Shanghai New Materials Sales Company Limited (“Shanghai Sales”), to transfer Shanghai Sales from HLJ Xinda Group to Mr. Gao for a total consideration of RMB50.0 million (equivalent to US$7.3 million). Pursuant to the contract, the Company completed the legal transfer on December 19, 2018 and the full consideration of US$7.3 million was received on April 11, 2019. The cash received was included in the cash flows from investing activities for the nine-month period ended September 30, 2019. (v) Hong Kong Grand Royal Trading Co., Ltd. (“Hong Kong Grand Royal”) is a raw material supplier of Dubai Xinda. Dubai Xinda has prepaid US$48.2 million to Hong Kong Grand Royal in 2017 for purchase of raw materials. Due to the price fluctuation of raw materials, Hong Kong Grand Royal could not purchase and deliver the raw materials to Dubai Xinda. In July 2019, both parties entered into a supplemental agreement to cancel the original purchase agreements and Hong Kong Grand Royal shall refund US$14.0 million by September 30, 2019 and US$34.2 million by October 30, 2019. As of September 30, 2019, Hong Kong Grand Royal has refunded US$5.6 million. On October 25, 2019, both parties entered into another supplemental agreement, pursuant to which, the remaining refund shall be paid by December 30, 2019. (vi) During the nine-month period ended September 30, 2019, the Company transferred US$50.1 million to Harbin Xinda High-Tech Co., Ltd. The amount was subsequently settled in November 2019. (vii) Others mainly include prepaid miscellaneous service fee and staff advance.

Property, plant and equipment_2

Property, plant and equipment, net (Tables)	9 Months Ended
	Sep. 30, 2019
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, plant and equipment consist of the following: September 30, 2019 December 31, 2018 US$ US$ Machinery, equipment and furniture 570,806,401 580,735,482 Motor vehicles 2,270,465 2,658,487 Workshops and buildings 154,524,398 157,976,839 Construction in progress 292,003,986 217,194,285 Total property, plant and equipment 1,019,605,250 958,565,093 Less accumulated depreciation (221,499,762 ) (182,623,813 ) Property, plant and equipment, net 798,105,488 775,941,280
Schedule of the Allocation of Depreciation Expense on Property, Plant and Equipment	For the three-month and nine-month periods ended September 30, 2019 and 2018, the Company capitalized US$1,581,827 and US$568,444, and US$2,326,326 and US$1,829,388 of interest costs as a component of the cost of construction in progress. Depreciation expense on property, plant and equipment was allocated to the following expense items: Three-Month Period Ended September 30, 2019 2018 US$ US$ Cost of revenues 13,251,745 9,219,288 General and administrative expenses 524,249 804,011 Research and development expenses 887,462 978,117 Selling expenses 1,107 1,332 Total depreciation expense 14,664,563 11,002,748 Nine-Month Period Ended September 30, 2019 2018 US$ US$ Cost of revenues 40,232,815 28,098,227 General and administrative expenses 1,730,020 2,405,381 Research and development expenses 2,855,749 2,954,445 Selling expenses 3,384 4,162 Total depreciation expense 44,821,968 33,462,215

Prepayments to equipment and _2

Prepayments to equipment and construction suppliers (Tables)	9 Months Ended
	Sep. 30, 2019
Prepayments to equipment suppliers [Abstract]
Schedule of Total Prepayments to Equipment Suppliers	September 30, 2019 December 31, 2018 US$ US$ Hailezi (i) 412,405,158 502,087,116 Green River (ii) — 15,778,057 Beijin Construction (iii) 6,670,735 6,867,269 Peaceful Treasure Limited(iv) 16,860,609 4,936,983 Others 390,460 966,894 Total Prepayments to equipment and construction suppliers 436,326,962 530,636,319 (i) On September 26, 2016 and February 28, 2017, HLJ Xinda Group entered into equipment purchase contracts with Hailezi for a total consideration of RMB782.2 million (equivalent to US$110.6 million) to purchase storage facility and other equipment, which will be used for upgrading the storage system of warehouse located in Harbin, China. Pursuant to the contract with Hailezi, HLJ Xinda Group prepaid RMB621.6 million (equivalent to US$87.9 million) during the first quarter of 2017. Due to a redesign of outdoor storage facility in June 2017, HLJ Xinda Group entered into a supplementary agreement with Hailezi, which decreased the original contract amount to RMB283.7 million (equivalent to US$40.1 million). Hailezi refunded RMB369.1 million (equivalent to US$52.2 million) to HLJ Xinda Group on June 22, 2017. In May 2019, HLJ Xinda Group has prepaid another RMB1.0 million (equivalent to US$0.1 million). As of September 30, 2019, HLJ Xinda Group has prepaid RMB253.5 million (equivalent to US$35.8 million).
Schedule of Summarized Balance of Prepayments	The table below summarized the balance of prepayments to Hailezi for each of the projects as of September 30, 2019 and December 31, 2018, and the movements of the prepayments: (in millions US$) Year Projects Balance as of December 31, 2018 Prepaid in 2019 Transfer to CIP in 2019 Effect of foreign currency exchange rate changes Balance as of September 30, 2019 2017 Storage system 36.8 0.1 — (1.1 ) 35.8 2017 HLJ project 134.2 — (75.0 ) (4.0 ) 55.2 2018 HLJ project 78.9 — — (2.3 ) 76.6 2017 Nanchong project 3.0 — — — 3.0 2018 Nanchong project 249.2 — — (7.4 ) 241.8 Total 502.1 0.1 (75.0 ) (14.8 ) 412.4 (ii) In December 2017, HLJ Xinda Group entered into a building purchase contract with Shanghai Caohejing Kangqiao Science & Green River Construction & Development Co., Ltd. for a total consideration of RMB216.6 million (equivalent to US$31.6 million), with a total area of 13,972.64 square meters with a prepaid RMB108.3 million (equivalent to US$15.8 million). (iii) Since November 15, 2016, Sichuan Xinda entered into decoration contracts with Sichuan Beijin Construction Engineering Company Limited ("Beijin Construction") to perform indoor and outdoor decoration work for a consideration of RMB264.3 million (equivalent to US$37.4 million). Pursuant to the contracts with Beijin Construction, Sichuan Xinda has prepaid RMB120.9 million (equivalent to US$17.1 million) as of September 30, 2019, of which RMB74.0 million (equivalent to US$10.4 million) was transferred to construction in progress. (iv) On October 20, 2016, Sichuan Xinda entered into an equipment purchase contract with Peaceful Treasure Limited ("Peaceful") for a total consideration of RMB89.8 million (equivalent to US$12.7 million) to purchase certain production and testing equipment. The Company prepaid RMB33.9 million (equivalent to US$4.8 million) as of September 30, 2019.

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Schedule of Short-term Loans	The Company has credit facilities with several banks under which they draw short-term and long-term bank loans as described below. (a) Current September 30, December 31, 2019 2018 US$ US$ Unsecured loans 310,183,942 418,198,508 Loans secured by accounts receivable 63,623,125 65,567,082 Loans secured by restricted cash 59,138,472 69,500,000 Current portion of long-term bank loans (note b) 186,577,210 176,401,330 Total short-term loans, including current portion of long-term bank loans 619,522,749 729,666,920
Schedule of Long-Term Debt	The loan was secured by restricted cash of RMB10.0 million (equivalent to US$1.4 million) in Postal Savings Bank of China. (b) Non-current September 30, 2019 December 31, 2018 US$ US$ Secured loans 72,652,556 2,177,985 Unsecured loans 300,443,100 196,031,589 Syndicate loan facility 90,000,000 90,000,000 Less: current portion (186,577,210 ) (176,401,330 ) Total long-term bank loans, excluding current portion 276,518,446 111,808,244
Maturities on long-term bank loans	Maturities on long-term bank loans (including current portion) are as follows: September 30, 2019 US$ 2019 181,410,945 2020 10,332,528 2021 105,060,291 2022 40,023,319 After 2022 126,268,573 Total 463,095,656

Accrued expenses and other cu_2

Accrued expenses and other current liabilities (Tables)	9 Months Ended
	Sep. 30, 2019
Accrued Liabilities, Current [Abstract]
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities consist of the following: September 30, 2019 December 31, 2018 US$ US$ Payables for purchase of property, plant and equipment 14,038,643 53,059,897 Accrued freight expenses 14,341,777 25,908,990 Accrued interest expenses 10,012,097 8,873,532 Contract liabilities (i) 16,248,016 16,105,245 Non income tax payables 4,617,298 6,425,236 Payables to Macromolecule Composite Materials (ii) 19,422,453 — Others (iii) 19,822,979 16,553,998 Total accrued expenses and other current liabilities 98,503,263 126,926,898 (i) Contract liabilities mainly represent the advance received from customers in the PRC for the finished goods and raw materials purchases as of September 30, 2019. The change in contract liabilities primarily represents the cash received, less amounts recognized as revenues during the period. (ii) As of September 30, 2019, the Company owed Heilongjiang Xinda Macromolecule Composite Materials Company Limited (“Macromolecule Composite Materials”) US$19.4 million, which was subsequently settled in October 2019. (iii) Others mainly represent accrued payroll and employee benefits, accrued audit and consulting fees, electricity fee and other accrued miscellaneous operating expenses.

Related party transactions (Tab

Related party transactions (Tables)	9 Months Ended
	Sep. 30, 2019
Related Party Transactions [Abstract]
Schedule of Significant Related Party Transactions	The related party transactions are summarized as follows: Three-Month Period Ended September 30, Nine-Month Period Ended September 30, 2019 2018 2019 2018 US$ US$ US$ US$ Transactions with related parties: Revenues resulting from transactions with a related party: Sales to Macromolecule Composite Materials (v) 734,895 — 1,040,485 — Financing transactions with related parties: Investment received in advance from Changmu (i) — — — 75,567,512 Refund of investment received in advance to Changmu (i) — (75,567,512 ) — (75,567,512 ) Proceeds of interest-free advances from Changmu (i) — 3,779,509 — 3,779,509 Interest-free advances from Mr. Jie Han (ii) — 1,162,926 2,920,049 1,162,926 Repayment of interest-free advances from Mr. Jie Han (ii) (116,802 ) — (116,802 ) — Interest-free advances from Mr. Jie Han’s son(ii) 8,760,147 726,830 8,760,147 726,830 Interest-free advances from senior management employee in HLJ Xinda Group and Sichuan Xinda (iii) — 8,587,164 275,234 8,587,164 Repayment of interest-free advances from senior management employees in HLJ Xinda Group and Sichuan Xinda (iii) (292,005 ) — (4,679,484 ) — Interest-free advances from Mr. Qingwei Ma (iv) 4,526,076 — 4,526,076 — Repayment of interest-free advances from Mr. Qingwei Ma (iv) (730,012 ) — (730,012 ) — Interest-free advances from Macromolecule Composite Materials (v) — — 63,488,212 — Repayment of interest-free advances from Macromolecule Composite Materials (v) (2,935,570 ) — (63,017,445 ) — Total financing transactions with related parties 9,211,834 (61,311,083 ) 11,425,975 14,256,429
Schedule of Related Parties Balances	The related party balances are summarized as follows: September 30, 2019 December 31, 2018 US$ US$ Amounts due to related parties: Mr. Jie Han 12,328,748 9,907,915 Mr. Jie Han’s wife 3,101,479 3,180,965 Mr. Jie Han’s son 9,190,007 728,523 Senior management employees in HLJ Xinda Group and Sichuan Xinda 148,530 4,548,335 Mr. Qingwei Ma 3,676,003 — Total amounts due to related parties 28,444,767 18,365,738 (i) On July 14, 2018, Xinda Holding (HK) entered into a subscription intent agreement with Changmu Investment (Beijing) Company Limited (“Changmu”), a company wholly controlled by Mr. Tiexin Han, the son of Mr. Jie Han, the Chief Executive Officer and Chairman of the Company. Pursuant to the terms of the agreement, HLJ Xinda Group received RMB500.0 million (equivalent to US$75.6 million) from Changmu on June 29, 2018 as deposits in order to subscribe newly authorized registered capital of HLJ Xinda Group subject to further negotiations. Due to the inability to reach agreement on the terms, both parties agreed not to proceed with any definitive agreement. Therefore, HLJ Xinda Group refunded the investment received in advance from Changmu in September 2018. (ii) During the nine-month ended September 30, 2018, the Company received RMB8.0 million (equivalent to US$1.2 million) from Mr. Jie Han, the Chairman of the Company, and RMB5.0 million (equivalent to US$0.7 million) from Mr. Tiexin Han, the son of Mr. Jie Han, as interest-free advances to the Company. (iii) In August 2018, the Company received RMB10.0 million (equivalent to US$1.5 million) each from three senior management employees (Messers Junjie Ma, Yuchong Jia, Guangjun Jiao) of Sichuan Xinda as interest-free advances to Sichuan Xinda. During the nine-month period ended September 30, 2018, the Company also received RMB29.1 million (equivalent to US$4.2 million) from a senior management employee (Mr. Rujun Dai) of HLJ Xinda Group as interest-free advances to HLJ Xinda Group. (iv) During the nine-month period ended September 30, 2019, the Company received RMB31.0 million (equivalent to US$4.5 million) from Qingwei Ma, the Chief Operating Officer of the Company, as interest-free advances to the Company, and repaid RMB5.0 million (equivalent to US$0.7 million). As of September 30, 2019, the amounts due to Mr. Qingwei Ma was RMB26.0 million (equivalent to US$3.7 million).

Other non-current liabilities (

Other non-current liabilities (Tables)	9 Months Ended
	Sep. 30, 2019
Other Liabilities, Noncurrent [Abstract]
Schedule of other non-current liabilities	September 30, December 31, 2019 2018 US$ US$ Income tax payable-noncurrent (i) 89,976,096 92,461,068 Deferred income tax liabilities 5,062,698 6,716,921 Others — 2,395,783 Total other non-current liabilities 95,038,794 101,573,772 (i) Income tax payable-noncurrent represents the repatriation tax, the accumulative balance of unrecognized tax benefits since 2015 and related accrued interest. According to the Tax Cuts and Jobs Act enacted on December 22, 2017, the management recognized the amount of U.S. tax corporate income tax is US$70,965,148 based on the deemed repatriation to the United States of accumulated earnings mandated by the U.S. tax reform, US$17,031,636 of which due payable in 2018 and 2019 was classified as current liabilities.

Stockholders' equity (Tables)

Stockholders' equity (Tables)	9 Months Ended
	Sep. 30, 2019
Stockholders' Equity Note [Abstract]
Schedule of Changes in Stockholders' Equity	The changes of each caption of stockholders' equity for the nine-month period ended September 30, 2019 are as follows: Series B Preferred Stock Common Stock Accumulated Number of Shares Amount Number of Shares Amount Treasury Stock Additional Paid-in Capital Retained Earnings Other Comprehensive Loss Total Stockholders' Equity US$ US$ US$ US$ US$ US$ US$ Balance at January 1, 2019 1,000,000 100 50,948,841 5,097 (92,694 ) 86,633,582 717,103,890 (54,732,547 ) 748,917,428 Net income - - - - - - 68,057,245 - 68,057,245 Series D Preferred Stock converted to common stock - - 16,000,000 1,600 - 97,574,865 - - 97,576,465 Other comprehensive income - Foreign currency translation adjustment, net of nil income taxes - - - - - - - (24,732,543 ) (24,732,543 ) Balance as of September 30, 2019 1,000,000 100 66,948,841 6,697 (92,694 ) 184,208,447 785,161,135 (79,465,090 ) 889,818,595

Earnings per share (Tables)

Earnings per share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings per common share:
Calculation of Basic and Diluted Earnings Per Share	Basic and diluted earnings per share are calculated as follows: Three-Month Period Ended September 30, Nine-Month Period Ended September 30, 2019 2018 2019 2018 US$ US$ US$ US$ Net income 16,965,213 8,964,941 68,057,245 55,288,920 Less: Earnings allocated to participating Series D convertible preferred stock (3,834,137 ) (2,140,971 ) (15,967,004 ) (13,257,752 ) Earnings allocated to participating nonvested shares — (8,904 ) — (106,113 ) Net income for basic and diluted earnings per share 13,131,076 6,815,066 52,090,241 41,925,055 Denominator Denominator for basic earnings per share 51,818,406 50,930,653 51,241,881 50,596,880 Dilutive effect of outstanding share options — 32,944 — 32,944 Denominator for diluted earnings per share 51,818,406 50,963,597 51,241,881 50,629,824 Earnings per share: Basic and diluted 0.25 0.13 1.02 0.83
Summary of Potentially Dilutive Securities	The following table summarizes potentially dilutive securities excluded from the calculation of diluted earnings per share for the three-month periods and nine-month periods ended September 30, 2019 and 2018 because their effects are anti-dilutive: Three-Month Period Ended September 30, Nine-Month Period Ended September 30, 2019 2018 2019 2018 Shares issuable upon conversion of Series D convertible preferred stock 15,130,435 16,000,000 15,706,960 16,000,000

Revenues (Tables)

Revenues (Tables)	9 Months Ended
	Sep. 30, 2019
Revenues [Abstract]
Revenues	Revenues consist of the following: Three-Month Period Ended September 30, Nine-Month Period Ended September 30, 2019 2018 2019 2018 US$ US$ US$ US$ Modified Polyamide 66 (PA66) 120,234,670 72,832,370 296,372,085 242,690,994 Modified Polyamide 6 (PA6) 78,940,503 54,018,912 250,529,646 180,317,333 Plastic Alloy 66,353,485 76,511,378 200,901,936 234,487,071 Modified Polypropylene (PP) 32,666,069 60,923,190 110,518,373 158,280,180 Modified Acrylonitrile Butadiene Styrene (ABS) 12,437,078 6,299,771 40,662,342 23,128,606 Polyoxymethylenes (POM) 2,053,799 2,881,985 6,953,161 7,753,725 Polyphenylene Oxide (PPO) 5,490,232 2,425,361 31,482,628 13,215,599 Polylactide (PLA) 17,525,906 20,854,274 46,789,233 64,583,387 Polyethylene (PE) 4,103,483 — 7,707,560 — Work in progress 33,062,822 — 145,362,837 — Raw materials 291,044 477,499 419,177 550,398 Total Revenue 373,159,091 297,224,740 1,137,698,978 925,007,293 The following table provides sales by major customer group for the three-month and nine-month periods ended September 30, 2019 and 2018 Three-month Period Ended September 30, Nine-month Period Ended September 30, 2019 2018 2019 2018 US$ US$ US$ US$ Distributor 312,919,940 292,507,429 918,602,515 911,068,381 Direct customers 59,948,107 4,239,812 218,677,286 13,388,514 Others 291,044 477,499 419,177 550,398 Total 373,159,091 297,224,740 1,137,698,978 925,007,293

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Schedule of Lease Cost	Lease cost for the nine-month period ended September 30, 2019 is as follows: Nine-Month Period Ended September 30, 2019 US$ Operating lease cost 1,271,455 Short-term lease cost 432,124 Total lease cost 1,703,579
Schedule of Maturities of Operating Lease Liabilities	As of September 30, 2019, the maturities of the operating lease liabilities are as follows: Remaining Lease Payments 2019 346,192 2020 1,386,124 2021 1,408,598 2022 1,408,979 2023 1,424,857 Thereafter 22,023,858 Total remaining lease payments 27,998,608 Less: imputed interest (12,094,615 ) Total operating lease liabilities 15,903,993 Less: current portion (1,390,531 ) Non-current operating lease liabilities 14,513,462 Weighted-average remaining lease term 17.5 years Weighted-average discount rate 6.7 %
Schedule of Supplemental Disclosure of Cash Flow Information	Supplemental cash flow information related to leases is as follows: Nine-Month Period Ended September 30, Supplemental disclosure of cash flow information: 2019 US$ Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases 1,707,618 Right-of-use assets obtained in exchange for new lease liabilities: Operating lease 16,075,213
Schedule of Future Minimum Annual Lease Payments	As previously disclosed in the consolidated financial statement for the year ended December 31, 2018 and under the previous lease standard (Topic 840), future minimum annual lease payments for the years subsequent to December 31, 2018 and in aggregate are as follows: US$ Years ended December 31, 2019 2,174,439 2020 1,486,007 2021 1,486,007 2022 1,446,251 2023 1,482,593 Thereafter 21,176,139

Basis of presentation, signif_2

Basis of presentation, significant concentrations and risks (Sales and Purchase Concentration) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Concentration Risk [Line Items]
Revenues	$ 373,159,091	$ 297,224,740	$ 1,137,698,978	$ 925,007,293
Customer Concentration Risk [Member] | Revenues [Member] | Distributor A, located in PRC [Member]
Concentration Risk [Line Items]
Revenues	$ 48,354,258	$ 43,675,493	$ 163,355,649	$ 136,172,680
Concentration risk, percentage	13.00%	14.80%	14.40%	14.70%
Customer Concentration Risk [Member] | Revenues [Member] | Distributor B, located in PRC [Member]
Concentration Risk [Line Items]
Revenues	$ 41,236,907	$ 38,087,744	$ 115,842,572	$ 114,870,175
Concentration risk, percentage	11.10%	12.80%	10.20%	12.40%
Customer Concentration Risk [Member] | Revenues [Member] | Distributor C, located in PRC [Member]
Concentration Risk [Line Items]
Revenues	$ 31,224,911	$ 34,620,819	$ 86,271,299	$ 105,340,424
Concentration risk, percentage	8.40%	11.60%	7.60%	11.40%
Customer Concentration Risk [Member] | Revenues [Member] | Major Distributors Aggregate [Member]
Concentration Risk [Line Items]
Revenues	$ 120,816,076	$ 116,384,056	$ 365,469,520	$ 356,383,279
Concentration risk, percentage	32.50%	39.20%	32.20%	38.50%
Raw Materials Supplier Concentration Risk [Member] | Purchase of Raw Materials [Member] | Major Raw Materials Distributors [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	31.60%	43.20%	32.60%	20.40%

Basis of presentation, signif_3

Basis of presentation, significant concentrations and risks (Cash Concentration) (Details)	Sep. 30, 2019USD ($)	Sep. 30, 2019CNY (¥)	Sep. 30, 2019HKD ($)	Sep. 30, 2019MOP (MOP$)	Dec. 31, 2018USD ($)
Restricted Cash and Cash Equivalents Items [Line Items]
Cash balance insured by the government authority	$ 1,372,734				$ 1,442,481
Restricted cash	224,647,340				325,690,023
RMB denominated bank deposits with Financial Institutions in the PRC [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents, restricted cash and time deposits maintained at banks	235,011,468				366,773,172
Cash balance insured by the government authority | ¥		¥ 500,000
Renminbi ("RMB") denominated bank deposits with Financial Institutions in Hong Kong Special Administrative Region ("Hong Kong SAR")[Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents, restricted cash and time deposits maintained at banks					8,134
U.S. dollar denominated bank deposits with Financial Institution in the U.S. [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents, restricted cash and time deposits maintained at banks	16,730				40,390
U.S. dollar denominated bank deposits with Financial Institution in the PRC [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents, restricted cash and time deposits maintained at banks	16,930				17,050
U.S. dollar denominated bank deposits with Financial Institution in Hong Kong SAR [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents, restricted cash and time deposits maintained at banks	78,930				131,892
Cash balance insured by the government authority			$ 500,000
U.S. dollar denominated bank deposits with Financial Institution in Macau Special Administrative Regio [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents, restricted cash and time deposits maintained at banks	910				6,144
Cash balance insured by the government authority | MOP$				MOP$ 500000
U.S. dollar denominated bank deposits with Financial Institution in Dubai, UAE [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents, restricted cash and time deposits maintained at banks	3,518				14,464
HK dollar denominated bank deposits with Financial institution in Hong Kong SAR [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents, restricted cash and time deposits maintained at banks	8,290				156
Dirham denominated bank deposits with Financial Institution in Dubai, UAE [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents, restricted cash and time deposits maintained at banks	19,966				438
Collateral For Bills Payable Related To Purchase Of Raw Materials [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	129,879,525				202,568,664
Government grant [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	1,430,537				1,469,935
Letter of guarantee [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	42,575,237				70,885,301
Syndicated Loans Obtained from Chartered Bank [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	49,348,194				50,766,123
Repayment to settle of Syndicated Loans Obtained from Standard Chartered Bank [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	45,000,000
Pledged as collateral to settle short-term bank loans obtained from Postal Savings Bank of China [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	14,900,000
Short-term bank loans obtained from Postal Savings Bank of China [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 1,413,847

Accounts receivable (Schedule o

Accounts receivable (Schedule of Accounts Receivable) (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Accounts receivable	$ 326,868,747	$ 294,726,804
Allowance for doubtful accounts	(37,374)	(38,516)
Accounts receivable, net	326,831,373	294,688,288
Notes receivable	335,142	27,392
Accounts receivable pledged as collateral for short-term bank loans	$ 37,431,712	$ 94,581,170

Accounts receivable (Schedule_2

Accounts receivable (Schedule of Aging of Accounts Receivable) (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Aging:
current	$ 270,927,987	$ 218,458,862
Total accounts receivable	326,868,747	294,726,804
1-3 months past due [Member]
Aging:
Past due	34,349,372	31,386,341
4-6 months past due [Member]
Aging:
Past due	5,753,489	109,412
7-12 months past due [Member]
Aging:
Past due	15,124,228	42,532,170
Greater than one year past due [Member]
Aging:
Past due	$ 713,671	$ 2,240,019

Inventories (Details)

Inventories (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Inventory, Net [Abstract]
Raw materials and work in progress	$ 690,531,879	$ 612,701,274
Finished goods	8,470,679	7,331,921
Total inventories	$ 699,002,558	$ 620,033,195

Prepaid expenses and other cu_3

Prepaid expenses and other current assets (Narrative) (Details)		1 Months Ended	9 Months Ended
		Dec. 31, 2017USD ($)	Sep. 30, 2019USD ($)	Oct. 30, 2019USD ($)	Sep. 30, 2019CNY (¥)	Jul. 31, 2019USD ($)	Apr. 11, 2019USD ($)	Dec. 31, 2018USD ($)
Receivable, Related Parties	[1]							$ 7,285,231
China, Yuan Renminbi [Member]
Receivable, Related Parties			63,500,000
Consideration for sales of Shanghai Sales [Member]
Receivable, Related Parties			7,300,000				$ 7,300,000
Consideration for sales of Shanghai Sales [Member] | China, Yuan Renminbi [Member]
Receivable, Related Parties | ¥					¥ 50,000,000
Hong Kong Grand Royal Trading Co.,Ltd [Member]
Prepaid		$ 48,200,000
Refund			14,000,000	$ 34,200,000		$ 5,600,000
Harbin Xinda High-Tech Co. Ltd. [Member]
Amount paid by Harbin Xinda High-Tech Co., Ltd.			$ 50,100,000
[1]	On December 18, 2018, HLJ Xinda Group entered into an agreement with Mr. Xiaohui Gao, General Manager of Heilongjiang Xinda Enterprise Group Shanghai New Materials Sales Company Limited ("Shanghai Sales"), to transfer Shanghai Sales from HLJ Xinda Group to Mr. Gao for a total consideration of RMB50.0 million (equivalent to US$7.4 million). Pursuant to the contract, the Company completed the legal transfer on December 19, 2018 and the full consideration of US$7.4 million was received on April 11, 2019. The cash received was included in the cash flows from investing activities for the nine-month period ended September 30, 2019.

Prepaid expenses and other cu_4

Prepaid expenses and other current assets (Details) - USD ($)		Sep. 30, 2019	Dec. 31, 2018
Prepaid Expense and Other Assets, Current [Abstract]
Value added taxes receivables	[1]	$ 1,911,502	$ 4,700,702
Advances to suppliers	[2]	131,089,782	104,469,023
Interest receivable	[3]	939,962	826,729
Consideration for sales of Shanghai Sales	[4]		7,285,231
Receivables from Hong Kong Grand Royal Trading Co., Ltd.	[5]	42,566,949
Receivables from Harbin Xinda High-Tech Co., Ltd.	[6]	50,096,218
Others	[7]	7,903,006	14,936,843
Total prepaid expenses and other current assets		$ 234,507,419	$ 132,218,528
[1]	Value added taxes receivables mainly represent the input taxes on purchasing equipment by Heilongjiang Xinda Enterprise Group Company Limited ("HLJ Xinda Group") and Sichuan Xinda, Enterprise Group Company Limited ("Sichuan Xinda"), which are to be net off with output taxes. Value added taxes receivables were recognized in operating activities in consolidated statements of cash flows.
[2]	Advances to suppliers are the advances to purchase raw materials.
[3]	Interest receivable mainly represents interest income accrued from restricted cash.
[4]	On December 18, 2018, HLJ Xinda Group entered into an agreement with Mr. Xiaohui Gao, General Manager of Heilongjiang Xinda Enterprise Group Shanghai New Materials Sales Company Limited ("Shanghai Sales"), to transfer Shanghai Sales from HLJ Xinda Group to Mr. Gao for a total consideration of RMB50.0 million (equivalent to US$7.4 million). Pursuant to the contract, the Company completed the legal transfer on December 19, 2018 and the full consideration of US$7.4 million was received on April 11, 2019. The cash received was included in the cash flows from investing activities for the nine-month period ended September 30, 2019.
[5]	Hong Kong Grand Royal Trading Co., Ltd. ("Hong Kong Grand Royal") is a raw material supplier of Dubai Xinda. Dubai Xinda has prepaid US$48.2 million to Hong Kong Grand Royal in 2017 for purchase of raw materials. Due to the price fluctuation of raw materials, Hong Kong Grand Royal could not purchase and deliver the raw materials to Dubai Xinda. In July 2019, both parties entered into a supplemental agreement to cancel the original purchase agreements and Hong Kong Grand Royal shall refund US$14.0 million by September 30, 2019 and US$34.2 million by October 30, 2019. As of September 30, 2019, Hong Kong Grand Royal has refunded US$5.6 million. On October 25, 2019, both parties entered into another supplemental agreement, pursuant to which, the remaining refund shall be paid by December 30, 2019.
[6]	During the nine-month period ended September 30, 2019, the Company transferred US$50.1 million to Harbin Xinda High-Tech Co., Ltd. The amount was subsequently settled in November 2019 .
[7]	Others mainly include prepaid miscellaneous service fee and staff advance.

Property, plant and equipment_3

Property, plant and equipment, net (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 1,019,605,250		$ 1,019,605,250		$ 958,565,093
Less accumulated depreciation	(221,499,762)		(221,499,762)		(182,623,813)
Property, plant and equipment, net	798,105,488		798,105,488		775,941,280
Capitalized interest expense	1,581,827	$ 568,444	2,326,326	$ 1,829,388
Machinery, equipment and furniture [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	570,806,401		570,806,401		580,735,482
Motor vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	2,270,465		2,270,465		2,658,487
Workshops and buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	154,524,398		154,524,398		157,976,839
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 292,003,986		$ 292,003,986		$ 217,194,285

Property, plant and equipment_4

Property, plant and equipment, net (Allocated Depreciation Expense) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Total depreciation expense	$ 14,664,563	$ 11,002,748	$ 44,821,968	$ 33,462,215
Cost of revenues [Member]
Property, Plant and Equipment [Line Items]
Total depreciation expense	13,251,745	9,219,288	40,232,815	28,098,227
General and administrative expenses [Member]
Property, Plant and Equipment [Line Items]
Total depreciation expense	524,249	804,011	1,730,020	2,405,381
Research and development expenses [Member]
Property, Plant and Equipment [Line Items]
Total depreciation expense	887,462	978,117	2,855,749	2,954,445
Selling expenses [Member]
Property, Plant and Equipment [Line Items]
Total depreciation expense	$ 1,107	$ 1,332	$ 3,384	$ 4,162

Prepayments to equipment and _3

Prepayments to equipment and construction suppliers (Narrative) (Details)

1 Months Ended

9 Months Ended

12 Months Ended

May 30, 2019USD ($)

May 30, 2019CNY (¥)

Sep. 30, 2018USD ($)

Sep. 30, 2018CNY (¥)

Jul. 31, 2018USD ($)T

Jun. 25, 2018T

Mar. 31, 2018USD ($)

Mar. 31, 2018CNY (¥)

Dec. 31, 2017USD ($)a

Jul. 21, 2017aT

Mar. 17, 2017USD ($)aT

Mar. 17, 2017CNY (¥)aT

Sep. 30, 2019USD ($)T

Sep. 30, 2019CNY (¥)T

Dec. 31, 2017USD ($)

Dec. 31, 2017CNY (¥)

Sep. 30, 2019CNY (¥)

Aug. 06, 2019CNY (¥)

May 31, 2019USD ($)

Dec. 31, 2018USD ($)

Nov. 30, 2018USD ($)

Nov. 30, 2018CNY (¥)

Jul. 31, 2018CNY (¥)

Jul. 12, 2018USD ($)

Jul. 12, 2018CNY (¥)

Jun. 30, 2018USD ($)

Jun. 21, 2018USD ($)

Jun. 21, 2018CNY (¥)

Dec. 31, 2017CNY (¥)

Mar. 17, 2017CNY (¥)

Nov. 15, 2016USD ($)

Nov. 15, 2016CNY (¥)

Oct. 20, 2016USD ($)

Oct. 20, 2016CNY (¥)

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

$ 436,326,962

$ 530,636,319

Receivable, Related Parties

[1]

7,285,231

China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Receivable, Related Parties

63,500,000

Sichuan Xinda [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

17,100,000

Sichuan Xinda [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

10,400,000

Sichuan Xinda [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Bio-composite material | T

300,000

300,000

Prepayments to equipment suppliers

1,300,000

$ 241,800,000

$ 17,100,000

Total consideration

$ 110,600,000

$ 110,600,000

$ 268,700,000

37,400,000

Prepaid

$ 244,400,000

Sichuan Xinda [Member] | Equipment [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

$ 10,400,000

Sichuan Xinda [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

¥ 120,900,000

Sichuan Xinda [Member] | China, Yuan Renminbi [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

74,000,000

Sichuan Xinda [Member] | China, Yuan Renminbi [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

9,400,000

¥ 1,710,100,000

¥ 120,900,000

Total consideration | ¥

¥ 1,900,100,000

¥ 782,200,000

264,300,000

Prepaid | ¥

¥ 1,728,900,000

Sichuan Xinda [Member] | China, Yuan Renminbi [Member] | Equipment [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

¥ 74,000,000

Hailezi [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

[2]

412,405,158

$ 502,087,116

Total consideration

40,100,000

40,100,000

Prepayments to be refunded from termination of contracts

1,800,000

Refunded amount in agreement

52,200,000

52,200,000

Refund of prepayment

3,000,000

Receivable, Related Parties

$ 500,000

Hailezi [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

87,900,000

87,900,000

Prepayments to be refunded from termination of contracts

$ 241,000,000

$ 241,000,000

Hailezi [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

283,700,000

Prepayments to be refunded from termination of contracts | ¥

¥ 12,400,000

Refunded amount in agreement | ¥

369,100,000

Refund of prepayment | ¥

¥ 20,800,000

Receivable, Related Parties | ¥

¥ 3,200,000

Hailezi [Member] | China, Yuan Renminbi [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

621,600,000

Prepayments to be refunded from termination of contracts | ¥

¥ 1,704,900,000

¥ 1,704,900,000

HLJ Xinda Group [Member]

Long-term Purchase Commitment [Line Items]

Prepaid

$ 100,000

$ 35,800,000

HLJ Xinda Group [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Bio-composite material | T

300,000

300,000

300,000

300,000

300,000

Prepayments to equipment suppliers

$ 130,200,000

$ 163,600,000

Net capital expenditures

75,000,000

Total consideration

$ 269,600,000

132,900,000

Prepaid

76,600,000

Remaining amount of prepaid prepayments

55,200,000

HLJ Xinda Group [Member] | Property, Plant and Equipment [Member]

Long-term Purchase Commitment [Line Items]

Bio-composite material | T

100,000

Area of property | a

41.2

HLJ Xinda Group [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Prepaid | ¥

¥ 1,000,000

¥ 253,500,000

Receivable, Related Parties | ¥

¥ 108,300,000

HLJ Xinda Group [Member] | China, Yuan Renminbi [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

920,900,000

¥ 1,157,000,000

Net capital expenditures | ¥

530,800,000

Total consideration | ¥

939,700,000

¥ 1,906,800,000

Prepaid | ¥

¥ 541,500,000

Remaining amount of prepaid prepayments | ¥

390,100,000

Nanchong Project [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

241,800,000

Nanchong Project [Member] | Property, Plant and Equipment [Member]

Long-term Purchase Commitment [Line Items]

Bio-composite material | T

20,000

20,000

Area of property | a

41.2

41.2

Net capital expenditures

$ 353,500,000

Refunded amount in agreement

241,000,000

Remaining amount of prepaid prepayments

$ 3,400,000

Nanchong Project [Member] | China, Yuan Renminbi [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

1,710,100,000

Nanchong Project [Member] | China, Yuan Renminbi [Member] | Property, Plant and Equipment [Member]

Long-term Purchase Commitment [Line Items]

Net capital expenditures | ¥

¥ 2,500,000,000

Refunded amount in agreement | ¥

1,704,900,000

Remaining amount of prepaid prepayments | ¥

¥ 24,000,000

Green River [Member] | Workshops and buildings [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

$ 15,800,000

15,800,000

15,800,000

Area of property | a

13,972.64

Total consideration

$ 31,600,000

$ 31,600,000

Green River [Member] | China, Yuan Renminbi [Member] | Workshops and buildings [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

108,300,000

108,300,000

Total consideration | ¥

¥ 216,600,000

Peaceful [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

[3]

16,860,609

$ 4,936,983

Peaceful [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

4,800,000

$ 18,800,000

Total consideration

$ 12,700,000

Prepaid

$ 12,100,000

Peaceful [Member] | China, Yuan Renminbi [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

¥ 33,900,000

Total consideration | ¥

¥ 89,800,000

[1]

On December 18, 2018, HLJ Xinda Group entered into an agreement with Mr. Xiaohui Gao, General Manager of Heilongjiang Xinda Enterprise Group Shanghai New Materials Sales Company Limited ("Shanghai Sales"), to transfer Shanghai Sales from HLJ Xinda Group to Mr. Gao for a total consideration of RMB50.0 million (equivalent to US$7.4 million). Pursuant to the contract, the Company completed the legal transfer on December 19, 2018 and the full consideration of US$7.4 million was received on April 11, 2019. The cash received was included in the cash flows from investing activities for the nine-month period ended September 30, 2019.

[2]

On September 26, 2016 and February 28, 2017, HLJ Xinda Group entered into equipment purchase contracts with Hailezi for a total consideration of RMB782.2 million (equivalent to US$110.6 million) to purchase storage facility and other equipment, which will be used for upgrading the storage system of warehouse located in Harbin, China. Pursuant to the contract with Hailezi, HLJ Xinda Group prepaid RMB621.6 million (equivalent to US$87.9 million) during the first quarter of 2017. Due to a redesign of outdoor storage facility in June 2017, HLJ Xinda Group entered into a supplementary agreement with Hailezi, which decreased the original contract amount to RMB283.7 million (equivalent to US$40.1 million). Hailezi refunded RMB369.1 million (equivalent to US$52.2 million) to HLJ Xinda Group on June 22, 2017. In May 2019, HLJ Xinda Group has prepaid another RMB1.0 million (equivalent to US$0.1 million). As of September 30, 2019, HLJ Xinda Group has prepaid RMB253.5 million (equivalent to US$35.8 million).

[3]

On October 20, 2016, Sichuan Xinda entered into an equipment purchase contract with Peaceful Treasure Limited ("Peaceful") for a total consideration of RMB89.8 million (equivalent to US$12.7 million) to purchase certain production and testing equipment. The Company prepaid RMB33.9 million (equivalent to US$4.8 million) as of September 30, 2019.

Prepayments to equipment and _4

Prepayments to equipment and construction suppliers (Schedule of Total Prepayments to Equipment Suppliers) (Details) - USD ($)		Sep. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Long-term Purchase Commitment [Line Items]
Total Prepayments to equipment and construction suppliers		$ 436,326,962	$ 530,636,319
Hailezi [Member]
Long-term Purchase Commitment [Line Items]
Total Prepayments to equipment and construction suppliers	[1]	412,405,158	502,087,116
Green River[Member]
Long-term Purchase Commitment [Line Items]
Total Prepayments to equipment and construction suppliers	[2]		15,778,057
Beijin Construction [Member]
Long-term Purchase Commitment [Line Items]
Total Prepayments to equipment and construction suppliers	[3]	6,670,735	6,867,269
Peaceful [Member]
Long-term Purchase Commitment [Line Items]
Total Prepayments to equipment and construction suppliers	[4]	16,860,609		$ 4,936,983
Others [Member]
Long-term Purchase Commitment [Line Items]
Total Prepayments to equipment and construction suppliers		$ 390,460	$ 966,894
[1]	On September 26, 2016 and February 28, 2017, HLJ Xinda Group entered into equipment purchase contracts with Hailezi for a total consideration of RMB782.2 million (equivalent to US$110.6 million) to purchase storage facility and other equipment, which will be used for upgrading the storage system of warehouse located in Harbin, China. Pursuant to the contract with Hailezi, HLJ Xinda Group prepaid RMB621.6 million (equivalent to US$87.9 million) during the first quarter of 2017. Due to a redesign of outdoor storage facility in June 2017, HLJ Xinda Group entered into a supplementary agreement with Hailezi, which decreased the original contract amount to RMB283.7 million (equivalent to US$40.1 million). Hailezi refunded RMB369.1 million (equivalent to US$52.2 million) to HLJ Xinda Group on June 22, 2017. In May 2019, HLJ Xinda Group has prepaid another RMB1.0 million (equivalent to US$0.1 million). As of September 30, 2019, HLJ Xinda Group has prepaid RMB253.5 million (equivalent to US$35.8 million).
[2]	In December 2017, HLJ Xinda Group entered into a building purchase contract with Shanghai Caohejing Kangqiao Science & Green River Construction & Development Co., Ltd. for a total consideration of RMB216.6 million (equivalent to US$30.6 million), with a total area of 13,972.64 square meters with a prepaid RMB108.3 million (equivalent to US$15.3 million).
[3]	Since November 15, 2016, Sichuan Xinda entered into decoration contracts with Sichuan Beijin Construction Engineering Company Limited ("Beijin Construction") to perform indoor and outdoor decoration work for a consideration of RMB264.3 million (equivalent to US$37.4 million). Pursuant to the contracts with Beijin Construction, Sichuan Xinda has prepaid RMB120.9 million (equivalent to US$17.1 million) as of September 30, 2019, of which RMB74.0 million (equivalent to US$10.4 million) was transferred to construction in progress.
[4]	On October 20, 2016, Sichuan Xinda entered into an equipment purchase contract with Peaceful Treasure Limited ("Peaceful") for a total consideration of RMB89.8 million (equivalent to US$12.7 million) to purchase certain production and testing equipment. The Company prepaid RMB33.9 million (equivalent to US$4.8 million) as of September 30, 2019.

Prepayments to equipment and _5

Prepayments to equipment and construction suppliers (Schedule of Summarized the Balance of Prepayments) (Details) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Storage system project in year 2017 [Member]
Long-term Purchase Commitment [Line Items]
Balance as of December 31, 2018	$ 36.8
Prepaid / (Utilized) in 2019	0.1
Transfer to CIP in 2019
Effect of foreign currency exchange rate changes	(1.1)
Balance as of June 30, 2019	35.8
HLJ project in year 2017 [Member]
Long-term Purchase Commitment [Line Items]
Balance as of December 31, 2018	134.2
Prepaid / (Utilized) in 2019
Transfer to CIP in 2019	(7.5)
Effect of foreign currency exchange rate changes	(0.4)
Balance as of June 30, 2019	55.2
HLJ project in year 2018 [Member]
Long-term Purchase Commitment [Line Items]
Balance as of December 31, 2018	78.9
Prepaid / (Utilized) in 2019
Transfer to CIP in 2019
Effect of foreign currency exchange rate changes	(2.3)
Balance as of June 30, 2019	76.6
Nanchong project in year 2017 [Member]
Long-term Purchase Commitment [Line Items]
Balance as of December 31, 2018	0.3
Prepaid / (Utilized) in 2019
Transfer to CIP in 2019
Effect of foreign currency exchange rate changes
Balance as of June 30, 2019	0.3
Nanchong project in year 2018 [Member]
Long-term Purchase Commitment [Line Items]
Balance as of December 31, 2018	249.2
Prepaid / (Utilized) in 2019
Transfer to CIP in 2019
Effect of foreign currency exchange rate changes	(7.4)
Balance as of June 30, 2019	241.8
Total Projects [Member]
Long-term Purchase Commitment [Line Items]
Balance as of December 31, 2018	502.1
Prepaid / (Utilized) in 2019	0.1
Transfer to CIP in 2019	(7.5)
Effect of foreign currency exchange rate changes	(14.8)
Balance as of June 30, 2019	$ 412.4

Losses on foreign currency op_2

Losses on foreign currency option contracts (Narrative) (Details) - Bank of China [Member] - USD ($)	9 Months Ended
	Sep. 30, 2019	Feb. 24, 2017
Foreign currency option contracts One [Member]
Derivatives, Fair Value [Line Items]
Nominal values of foreign currency option contracts		$ 5,000,000
Recognized losses on foreign currency option contracts	$ 500,000
Foreign currency option contracts Two [Member]
Derivatives, Fair Value [Line Items]
Nominal values of foreign currency option contracts		$ 10,000,000

Borrowings (Current) (Narrative

Borrowings (Current) (Narrative) (Details)	1 Months Ended	9 Months Ended
	Nov. 29, 2019USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2019CNY (¥)	Sep. 30, 2019CNY (¥)	Dec. 31, 2018	May 31, 2018USD ($)	May 31, 2018CNY (¥)	Oct. 31, 2017USD ($)	Oct. 31, 2017CNY (¥)	Jul. 31, 2017USD ($)	Jul. 31, 2017CNY (¥)
Short-term Debt [Line Items]
Weighted average interest rate		4.80%		4.80%	4.70%
Initial term of loan		1 year	1 year
Thirteen Month Secured loan [Member]
Short-term Debt [Line Items]
Aggregated principal amount		$ 63,600,000
Debt instrument, interest rate		4.35%		4.35%
Repaid amount of loan		$ 63,600,000
Accounts receivable released		37,400,000
Thirteen Month Secured loan [Member] | China, Yuan Renminbi [Member]
Short-term Debt [Line Items]
Aggregated principal amount | ¥				¥ 450,000,000
Repaid amount of loan | ¥			¥ 450,000,000
Accounts receivable released | ¥			¥ 264,800,000
One Year Secured Loan [Member] | Bank of China [Member]
Short-term Debt [Line Items]
Aggregated principal amount								$ 5,000,000		$ 14,000,000
Debt instrument, interest rate								2.50%	2.50%	2.50%	2.50%
One Year Secured Loan [Member] | Bank of China [Member] | Transaction One [Member]
Short-term Debt [Line Items]
Aggregated principal amount								$ 5,500,000
Debt instrument, interest rate								2.50%	2.50%
One Year Secured Loan [Member] | Loans secured by restricted cash [Member]
Short-term Debt [Line Items]
Aggregated principal amount								$ 5,500,000		$ 15,600,000
One Year Secured Loan [Member] | Loans secured by restricted cash [Member] | Transaction One [Member]
Short-term Debt [Line Items]
Aggregated principal amount								$ 6,100,000
One Year Secured Loan [Member] | China, Yuan Renminbi [Member] | Loans secured by restricted cash [Member]
Short-term Debt [Line Items]
Aggregated principal amount | ¥									¥ 37,500,000		¥ 107,000,000
One Year Secured Loan [Member] | China, Yuan Renminbi [Member] | Loans secured by restricted cash [Member] | Transaction One [Member]
Short-term Debt [Line Items]
Aggregated principal amount | ¥									¥ 42,000,000
Three-month secured short-term loan [Member] | Loans secured by restricted cash [Member]
Short-term Debt [Line Items]
Aggregated principal amount						$ 42,600,000
Three-month secured short-term loan [Member] | Loans secured by restricted cash [Member] | Subsequent Event [Member]
Short-term Debt [Line Items]
Repaid amount of loan	$ 135,000,000
Three-month secured short-term loan [Member] | Standard Chartered Bank [Member]
Short-term Debt [Line Items]
Aggregated principal amount						$ 45,000,000
Debt instrument, interest rate						1.50%	1.50%
Three-month secured short-term loan [Member] | China, Yuan Renminbi [Member] | Loans secured by restricted cash [Member]
Short-term Debt [Line Items]
Aggregated principal amount | ¥							¥ 300,000,000
Nine-month secured short-term loan [Member] | Loans secured by restricted cash [Member]
Short-term Debt [Line Items]
Aggregated principal amount		1,400,000
Nine-month secured short-term loan [Member] | Postal Savings Bank of China [Member]
Short-term Debt [Line Items]
Aggregated principal amount		$ 14,100,000
Debt instrument, interest rate		4.35%		4.35%
Nine-month secured short-term loan [Member] | China, Yuan Renminbi [Member] | Loans secured by restricted cash [Member]
Short-term Debt [Line Items]
Aggregated principal amount | ¥				¥ 10,000,000
Nine-month secured short-term loan [Member] | China, Yuan Renminbi [Member] | Postal Savings Bank of China [Member]
Short-term Debt [Line Items]
Aggregated principal amount | ¥				¥ 100,000,000

Borrowings (Schedule of Short-T

Borrowings (Schedule of Short-Term Loans, Including Current Portion of Long-Term Bank Loans) (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Total short-term loans, including current portion of long-term bank loans	$ 619,522,749	$ 729,666,920
Unsecured loans [Member]
Short-term Debt [Line Items]
Total short-term loans, including current portion of long-term bank loans	310,183,942	418,198,508
Loans secured by accounts receivable [Member]
Short-term Debt [Line Items]
Total short-term loans, including current portion of long-term bank loans	63,623,125	65,567,082
Loans secured by restricted cash [Member]
Short-term Debt [Line Items]
Total short-term loans, including current portion of long-term bank loans	59,138,472	69,500,000
Current portion of long-term bank loans [Member]
Short-term Debt [Line Items]
Total short-term loans, including current portion of long-term bank loans	$ 186,577,210	$ 176,401,330

Borrowings (Schedule of Long-Te

Borrowings (Schedule of Long-Term Bank Loans Excluding Current Portion) (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total long-term bank loans, excluding current portion	$ 276,518,446	$ 111,808,244
Secured loans [Member]
Debt Instrument [Line Items]
Total long-term bank loans, excluding current portion	72,652,556	2,177,985
Unsecured loans [Member]
Debt Instrument [Line Items]
Total long-term bank loans, excluding current portion	300,443,100	196,031,589
Syndicate loan facility [Member]
Debt Instrument [Line Items]
Total long-term bank loans, excluding current portion	90,000,000	90,000,000
Current Portion [Member]
Debt Instrument [Line Items]
Total long-term bank loans, excluding current portion	$ 186,577,210	$ 176,401,330

Borrowings (Schedule of Maturit

Borrowings (Schedule of Maturities on Long-term Bank Loans Including Current Portion) (Details)	Sep. 30, 2019USD ($)
Debt Disclosure [Abstract]
2019	$ 181,410,945
2020	10,332,528
2021	105,060,291
2022	40,023,319
After 2022	126,268,573
Total	$ 463,095,656

Borrowings (Non-current) (Narra

Borrowings (Non-current) (Narrative) (Details)

Dec. 09, 2016USD ($)

Dec. 30, 2023USD ($)

Dec. 30, 2023CNY (¥)

Dec. 30, 2022USD ($)

Dec. 30, 2022CNY (¥)

Dec. 20, 2022USD ($)

Dec. 20, 2022CNY (¥)

Jun. 30, 2022USD ($)

Jun. 30, 2022CNY (¥)

Jun. 20, 2022USD ($)

Jun. 20, 2022CNY (¥)

Dec. 30, 2021USD ($)

Dec. 30, 2021CNY (¥)

Dec. 20, 2021USD ($)

Dec. 20, 2021CNY (¥)

Jun. 30, 2021USD ($)

Jun. 30, 2021CNY (¥)

Jun. 20, 2021USD ($)

Jun. 20, 2021CNY (¥)

Dec. 30, 2020USD ($)

Dec. 30, 2020CNY (¥)

Oct. 28, 2020USD ($)

Oct. 28, 2020CNY (¥)

Jun. 30, 2020USD ($)

Jun. 30, 2020CNY (¥)

Apr. 28, 2020USD ($)

Apr. 28, 2020CNY (¥)

Dec. 30, 2019USD ($)

Dec. 30, 2019CNY (¥)

Nov. 29, 2019USD ($)

Oct. 28, 2019USD ($)

Oct. 28, 2019CNY (¥)

Jun. 30, 2019USD ($)

Jun. 30, 2019AED (د.إ)

Jun. 17, 2019USD ($)

Apr. 28, 2019USD ($)

Apr. 28, 2019CNY (¥)

Dec. 26, 2018USD ($)

Dec. 26, 2018AED (د.إ)

Oct. 28, 2018USD ($)

Oct. 28, 2018CNY (¥)

Aug. 22, 2018USD ($)

Dec. 31, 2017USD ($)

Oct. 28, 2017USD ($)

Oct. 28, 2017CNY (¥)

Apr. 28, 2017USD ($)

Apr. 28, 2017CNY (¥)

Mar. 23, 2017USD ($)

Sep. 30, 2019USD ($)

Sep. 30, 2019CNY (¥)

Sep. 30, 2019AED (د.إ)

Sep. 30, 2018USD ($)

Sep. 30, 2017USD ($)

Dec. 31, 2017USD ($)

Oct. 02, 2019USD ($)

Sep. 30, 2019CNY (¥)

Jun. 17, 2019CNY (¥)

Jan. 31, 2019USD ($)

Jan. 31, 2019CNY (¥)

Dec. 26, 2018AED (د.إ)

Jan. 30, 2018USD ($)

Jan. 30, 2018CNY (¥)

Dec. 31, 2017CNY (¥)

Mar. 23, 2017CNY (¥)

Dec. 09, 2016CNY (¥)

Debt Instrument [Line Items]

Initial term of loan

1 year

1 year

1 year

Three Five Year Unsecured Loan [Member] | Unsecured Debt from Bank of China [Member]

Debt Instrument [Line Items]

Aggregated principal amount

$ 36,800,000

Debt instrument, interest rate

4.75%

4.75%

Three Five Year Unsecured Loan [Member] | Unsecured Debt from Bank of China [Member] | China, Yuan Renminbi [Member]

Debt Instrument [Line Items]

Aggregated principal amount | ¥

¥ 260,000,000

One Four Year Unsecured Loans [Member] | Unsecured Debt from Bank of China [Member]

Debt Instrument [Line Items]

Aggregated principal amount

$ 11,300,000

Debt instrument, interest rate

4.75%

4.75%

One Four Year Unsecured Loans [Member] | Unsecured Debt from Bank of China [Member] | China, Yuan Renminbi [Member]

Debt Instrument [Line Items]

Aggregated principal amount | ¥

¥ 80,000,000

Long term unsecured loan [Member] | Unsecured Debt from Bank of China [Member]

Debt Instrument [Line Items]

Repayment of long-term debt

$ 3,500,000

$ 24,700,000

$ 24,700,000

$ 10,600,000

Long term unsecured loan [Member] | Unsecured Debt from Bank of China [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Repayment of long-term debt

$ 10,600,000

$ 2,800,000

$ 24,700,000

Long term unsecured loan [Member] | Unsecured Debt from Bank of China [Member] | China, Yuan Renminbi [Member]

Debt Instrument [Line Items]

Repayment of long-term debt | ¥

¥ 25,000,000

¥ 175,000,000

¥ 175,000,000

¥ 75,000,000

Long term unsecured loan [Member] | Unsecured Debt from Bank of China [Member] | China, Yuan Renminbi [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Repayment of long-term debt | ¥

¥ 75,000,000

¥ 20,000,000

¥ 175,000,000

Long term unsecured loan [Member] | Bank of China [Member]

Debt Instrument [Line Items]

Debt instrument, issuer

Bank of China

Bank of China

Aggregated principal amount

$ 4,200,000

$ 3,500,000

Debt instrument, interest rate

4.75%

4.75%

4.75%

4.75%

Repayment of long-term debt

$ 1,400,000

Long term unsecured loan [Member] | Bank of China [Member] | China, Yuan Renminbi [Member]

Debt Instrument [Line Items]

Aggregated principal amount | ¥

¥ 25,000,000

¥ 30,000,000

Repayment of long-term debt | ¥

¥ 10,000,000

Long term unsecured loan [Member] | Longjiang Bank, Harbin Branch [Member]

Debt Instrument [Line Items]

Debt instrument, issuer

Longjiang Bank, Harbin Branch

Longjiang Bank, Harbin Branch

Longjiang Bank, Harbin Branch

Longjiang Bank, Harbin Branch

Aggregated principal amount

$ 84,800,000

$ 31,100,000

Debt instrument, interest rate

5.635%

5.635%

5.635%

5.635%

Long term unsecured loan [Member] | Longjiang Bank, Harbin Branch [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Repayment of long-term debt

$ 28,200,000

$ 28,200,000

$ 14,200,000

$ 14,200,000

Long term unsecured loan [Member] | Longjiang Bank, Harbin Branch [Member] | China, Yuan Renminbi [Member]

Debt Instrument [Line Items]

Aggregated principal amount | ¥

¥ 219,600,000

¥ 600,000,000

Long term unsecured loan [Member] | Longjiang Bank, Harbin Branch [Member] | China, Yuan Renminbi [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Repayment of long-term debt | ¥

¥ 200,000,000

¥ 200,000,000

¥ 100,000,000

¥ 100,000,000

Seven-year unsecured loan [Member] | Longjiang Bank, Harbin Branch [Member]

Debt Instrument [Line Items]

Debt instrument, issuer

Longjiang Bank, Harbin Branch

Initial term of loan

7 years

Aggregated principal amount

$ 74,400,000

$ 74,400,000

$ 23,900,000

Debt instrument, interest rate

4.90%

4.90%

4.90%

4.90%

4.90%

Repayment of long-term debt

$ 2,100,000

Seven-year unsecured loan [Member] | Longjiang Bank, Harbin Branch [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Repayment of long-term debt

$ 38,200,000

$ 12,700,000

$ 12,700,000

$ 9,900,000

$ 9,900,000

$ 5,000,000

$ 5,000,000

$ 2,800,000

Seven-year unsecured loan [Member] | Longjiang Bank, Harbin Branch [Member] | China, Yuan Renminbi [Member]

Debt Instrument [Line Items]

Aggregated principal amount | ¥

¥ 169,100,000

¥ 526,300,000

Repayment of long-term debt | ¥

¥ 15,000,000

Seven-year unsecured loan [Member] | Longjiang Bank, Harbin Branch [Member] | China, Yuan Renminbi [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Repayment of long-term debt | ¥

¥ 270,400,000

¥ 90,000,000

¥ 90,000,000

¥ 70,000,000

¥ 70,000,000

¥ 35,000,000

¥ 35,000,000

¥ 20,000,000

Four long-term unsecured loans [Member] | Nanchong Shuntou Development Group Co. Ltd. [Member]

Debt Instrument [Line Items]

Debt instrument, issuer

Nanchong Shuntou Development Group Co., Ltd.

Aggregated principal amount

$ 60,800,000

$ 60,800,000

Debt instrument, maturity date

Sep. 30, 2019

Debt instrument, interest rate

4.35%

4.35%

4.35%

Four long-term unsecured loans [Member] | Nanchong Shuntou Development Group Co. Ltd. [Member] | China, Yuan Renminbi [Member]

Debt Instrument [Line Items]

Aggregated principal amount | ¥

¥ 430,000,000

Consortium of banks and financial institutions led by Standard Chartered Bank [Member]

Debt Instrument [Line Items]

Debt instrument, issuer

Standard Chartered Bank (Hong Kong) Limited

Standard Chartered Bank (Hong Kong) Limited

Standard Chartered Bank (Hong Kong) Limited

Aggregated principal amount

$ 180,000,000

Debt instrument, issuance date

Aug. 22, 2016

Aug. 22, 2016

Aug. 22, 2016

Repayment of long-term debt

$ 90,000,000

$ 49,300,000

$ 90,000,000

$ 90,000,000

Consortium of banks and financial institutions led by Standard Chartered Bank [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Aggregated principal amount

$ 135,000,000

Repayment of long-term debt

$ 135,000,000

Consortium of banks and financial institutions led by Standard Chartered Bank [Member] | China, Yuan Renminbi [Member]

Debt Instrument [Line Items]

Repayment of long-term debt | ¥

¥ 349,000,000

Five Year Secured Loan [Member] | National Bank of Umm Al Qaiwain [Member]

Debt Instrument [Line Items]

Aggregated principal amount

$ 2,200,000

Debt instrument, interest rate

2.35%

2.35%

Spread over variable rate

3.75%

3.75%

Security Deposit

$ 2,400,000

Repayment of long-term debt

$ 200,000

Five Year Secured Loan [Member] | National Bank of Umm Al Qaiwain [Member] | Ten Half-Yearly Installments [Member]

Debt Instrument [Line Items]

Repayment of long-term debt

$ 200,000

$ 200,000

Five Year Secured Loan [Member] | National Bank of Umm Al Qaiwain [Member] | United Arab Emirates, Dirhams [Member]

Debt Instrument [Line Items]

Aggregated principal amount | د.إ

د.إ 8,000,000

Security Deposit | د.إ

د.إ 8,800,000

Repayment of long-term debt | د.إ

د.إ 800,000

Five Year Secured Loan [Member] | National Bank of Umm Al Qaiwain [Member] | United Arab Emirates, Dirhams [Member] | Ten Half-Yearly Installments [Member]

Debt Instrument [Line Items]

Repayment of long-term debt | د.إ

د.إ 800,000

د.إ 800,000

Two Year Secured Loan [Member] | China Construction Bank [Member]

Debt Instrument [Line Items]

Aggregated principal amount

$ 70,700,000

Two Year Secured Loan [Member] | China Construction Bank [Member] | China, Yuan Renminbi [Member]

Debt Instrument [Line Items]

Aggregated principal amount | ¥

¥ 500,000,000

Accrued expenses and other cu_3

Accrued expenses and other current liabilities (Schedule of Accrued expenses and other current liabilities) (Details) - USD ($)		Sep. 30, 2019	Dec. 31, 2018
Accrued Liabilities, Current [Abstract]
Payables for purchase of property, plant and equipment		$ 14,038,643	$ 53,059,897
Accrued freight expenses		14,341,777	25,908,990
Accrued interest expenses		10,012,097	8,873,532
Contract liabilities	[1]	16,248,016	16,105,245
Non income tax payables		4,617,298	6,425,236
Payables to Macromolecule Composite Materials	[2]	19,422,453
Others	[3]	19,822,979	16,553,998
Total accrued expenses and other current liabilities		$ 98,503,263	$ 126,926,898
[1]	Contract liabilities mainly represent the advance received from customers in the PRC for the finished goods and raw materials purchases as of September 30, 2019. The change in contract liabilities primarily represents the cash received, less amounts recognized as revenues during the period.
[2]	As of September 30, 2019, the Company owed Heilongjiang Xinda Macromolecule Composite Materials Company Limited ("Macromolecule Composite Materials") US$19.4 million, which was subsequently settled in October 2019.
[3]	Others mainly represent accrued payroll and employee benefits, accrued audit and consulting fees, electricity fee and other accrued miscellaneous operating expenses.

Related Party Transactions (Nar

Related Party Transactions (Narrative) (Details)

9 Months Ended

Sep. 30, 2019USD ($)

Sep. 30, 2019CNY (¥)

Sep. 30, 2019CNY (¥)

Apr. 30, 2019USD ($)

Apr. 30, 2019CNY (¥)

Apr. 22, 2019USD ($)

Dec. 31, 2018USD ($)

Dec. 31, 2018CNY (¥)

Sep. 30, 2018USD ($)

Sep. 30, 2018CNY (¥)

Aug. 31, 2018USD ($)

Aug. 31, 2018CNY (¥)

Jul. 14, 2018USD ($)

Jul. 14, 2018CNY (¥)

Receivable, Related Parties

[1]

$ 7,285,231

Due to Related Parties

28,444,767

18,365,738

China, Yuan Renminbi [Member]

Receivable, Related Parties

63,500,000

Mr. Jie Han [Member]

Receivable, Related Parties

2,900,000

$ 1,200,000

$ 75,600,000

Repayment of Amount of Related Parties

100,000

Due to Related Parties

[2]

12,300,000

9,907,915

Mr. Jie Han [Member] | China, Yuan Renminbi [Member]

Receivable, Related Parties | ¥

¥ 20,000,000

¥ 8,000,000

¥ 500,000,000

Repayment of Amount of Related Parties | ¥

¥ 800,000

Due to Related Parties | ¥

87,200,000

Changmu [Member]

Receivable, Related Parties

3,800,000

Changmu [Member] | China, Yuan Renminbi [Member]

Receivable, Related Parties | ¥

26,000,000

Mr. Tiexin Han [Member]

Receivable, Related Parties

$ 700,000

Due from Related Parties

8,800,000

Due to Related Parties

9,200,000

Mr. Tiexin Han [Member] | China, Yuan Renminbi [Member]

Receivable, Related Parties | ¥

¥ 5,000,000

Due from Related Parties | ¥

60,000,000

Due to Related Parties | ¥

6,500,000

Sichuan Xinda [Member]

Receivable, Related Parties

$ 1,500,000

Sichuan Xinda [Member] | China, Yuan Renminbi [Member]

Receivable, Related Parties | ¥

¥ 10,000,000

Senior Management [Member]

Receivable, Related Parties

$ 4,400,000

$ 4,200,000

Senior Management [Member] | China, Yuan Renminbi [Member]

Receivable, Related Parties | ¥

¥ 30,000,000

¥ 29,100,000

Mr. Rujun Dai [Member]

Receivable, Related Parties

300,000

Repayment of Amount of Related Parties

300,000

Due from Related Parties

100,000

Mr. Rujun Dai [Member] | China, Yuan Renminbi [Member]

Receivable, Related Parties | ¥

1,900,000

Repayment of Amount of Related Parties | ¥

2,000,000

Due from Related Parties | ¥

1,100,000

Qingwei Ma [Member]

Receivable, Related Parties

4,500,000

Repayment of Amount of Related Parties

700,000

Due from Related Parties

3,700,000

Qingwei Ma [Member] | China, Yuan Renminbi [Member]

Receivable, Related Parties | ¥

31,000,000

Repayment of Amount of Related Parties | ¥

¥ 5,000,000

Due from Related Parties | ¥

26,000,000

Macromolecule Composite Materials [Member]

Receivable, Related Parties

434,400,000

$ 1,000,000

Interest rate

97.50%

Due from Related Parties

278,370

Advance from Macromolecule Composite Materials [Member]

Receivable, Related Parties

$ 63,000,000

Advance from Macromolecule Composite Materials [Member] | China, Yuan Renminbi [Member]

Receivable, Related Parties | ¥

¥ 431,600,000

[1]

On December 18, 2018, HLJ Xinda Group entered into an agreement with Mr. Xiaohui Gao, General Manager of Heilongjiang Xinda Enterprise Group Shanghai New Materials Sales Company Limited ("Shanghai Sales"), to transfer Shanghai Sales from HLJ Xinda Group to Mr. Gao for a total consideration of RMB50.0 million (equivalent to US$7.4 million). Pursuant to the contract, the Company completed the legal transfer on December 19, 2018 and the full consideration of US$7.4 million was received on April 11, 2019. The cash received was included in the cash flows from investing activities for the nine-month period ended September 30, 2019.

[2]

During the year ended December 31, 2018, the Company received RMB68.0 million (equivalent to US$9.5 million) from Mr. Jie Han, the Chairman of the Company, RMB21.8 million (equivalent to US$3.1 million) from Ms. Limei Sun, the wife of Mr. Jie Han, and RMB5.0 million (equivalent to US$0.7 million) from Mr. Tiexin Han, the son of Mr. Jie Han, as interest-free advances to the Company.

Related Party Transactions (Sch

Related Party Transactions (Schedule of Significant Related Party Transactions) (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Transactions with related parties		$ 9,211,834	$ (61,311,083)	$ 11,425,975	$ 14,256,429
Changmu [Member]
Transactions with related parties	[1]				75,567,512
Refund of investment received in advance to Changmu [Member]
Transactions with related parties	[1]		(75,567,512)		(75,567,512)
Proceeds of interest-free advances from Changmu [Member]
Transactions with related parties	[1]		3,779,509		3,779,509
Mr. Jie Han [Member]
Transactions with related parties	[2]		1,162,926	2,920,049	1,162,926
Repayment of interest-free advances from Mr. Jie Han [Member]
Transactions with related parties	[2]	(116,802)		(116,802)
Interest-free advances from Mr. Jie Han's son [Member]
Transactions with related parties	[2]	8,760,147	726,830	8,760,147	726,830
Senior Managements [Member]
Transactions with related parties	[3]		8,587,164	275,234	8,587,164
HLJ Xinda Group and Sichuan Xinda [Member]
Transactions with related parties	[3]	(292,005)		(4,679,484)
Mr. Qingwei Ma [Member]
Transactions with related parties	[4]	4,526,076		4,526,076
Advances from Mr. Qingwei Ma [Member]
Transactions with related parties	[4]	(730,012)		(730,012)
Macromolecule Composite Materials [Member]
Transactions with related parties	[5]			63,488,212
Revenues transactions with related parties	[5]	734,895		1,040,485
Advance from Macromolecule Composite Materials [Member]
Transactions with related parties	[5]	$ (2,935,570)		$ (63,017,445)
[1]	On July 14, 2018, Xinda Holding (HK) entered into a subscription intent agreement with Changmu Investment (Beijing) Company Limited ("Changmu"), a company wholly controlled by Mr. Tiexin Han, the son of Mr. Jie Han, the Chief Executive Officer and Chairman of the Company. Pursuant to the terms of the agreement, HLJ Xinda Group received RMB500.0 million (equivalent to US$75.6 million) from Changmu on June 29, 2018 as deposits in order to subscribe newly authorized registered capital of HLJ Xinda Group subject to further negotiations. Due to the inability to reach agreement on the terms, both parties agreed not to proceed with any definitive agreement. Therefore, HLJ Xinda Group refunded the investment received in advance from Changmu in September 2018.
[2]	During the year ended December 31, 2018, the Company received RMB68.0 million (equivalent to US$9.5 million) from Mr. Jie Han, the Chairman of the Company, RMB21.8 million (equivalent to US$3.1 million) from Ms. Limei Sun, the wife of Mr. Jie Han, and RMB5.0 million (equivalent to US$0.7 million) from Mr. Tiexin Han, the son of Mr. Jie Han, as interest-free advances to the Company.
[3]	In August 2018, the Company received RMB10.0 million (equivalent to US$1.5 million) each from three senior management employees (Messers Junjie Ma, Yuchong Jia, Guangjun Jiao) of Sichuan Xinda as interest-free advances to Sichuan Xinda. During the nine-month period ended September 30, 2018, the Company also received RMB29.1 million (equivalent to US$4.2 million) from a senior management employee (Mr. Rujun Dai) of HLJ Xinda Group as interest-free advances to HLJ Xinda Group.
[4]	During the nine-month period ended September 30, 2019, the Company received RMB31.0 million (equivalent to US$4.5 million) from Qingwei Ma, the Chief Operating Officer of the Company, as interest-free advances to the Company, and repaid RMB5.0 million (equivalent to US$0.7 million). As of September 30, 2019, the amounts due to Mr. Qingwei Ma was RMB26.0 million (equivalent to US$3.7 million).
[5]	On December 26, 2018, Shanghai Sales set up Heilongjiang Xinda Macromolecule Composite Materials Company Limited ("Macromolecule Composite Materials"). On April 22, 2019, Shanghai Sales transferred 97.5% equity interest in Macromolecule Composite Materials to Harbin Shengtong Engineering Plastics Co. Ltd. ("Harbin Shengtong"). Mr. Xigang Chen, the general manager of Sichuan Xinda, is the general manager and also the principal shareholder of Harbin Shengtong.

Related Party Transactions (S_2

Related Party Transactions (Schedule of Related Parties Balances) (Details) - USD ($)		Sep. 30, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Amounts due to a related party		$ 28,444,767	$ 18,365,738
Mr. Jie Han [Member]
Related Party Transaction [Line Items]
Amounts due to a related party	[1]	12,300,000	9,907,915
Mr. Jie Han's wife [Member]
Related Party Transaction [Line Items]
Amounts due to a related party	[1]	3,101,479	3,180,965
Mr. Jie Han's son [Member]
Related Party Transaction [Line Items]
Amounts due to a related party	[1]	9,190,007	728,523
Senior Managements [Member]
Related Party Transaction [Line Items]
Amounts due to a related party	[2]	148,530	4,548,335
Mr. Qingwei Ma [Member]
Related Party Transaction [Line Items]
Amounts due to a related party	[3]	$ 3,676,003
[1]	During the year ended December 31, 2018, the Company received RMB68.0 million (equivalent to US$9.5 million) from Mr. Jie Han, the Chairman of the Company, RMB21.8 million (equivalent to US$3.1 million) from Ms. Limei Sun, the wife of Mr. Jie Han, and RMB5.0 million (equivalent to US$0.7 million) from Mr. Tiexin Han, the son of Mr. Jie Han, as interest-free advances to the Company.
[2]	In August 2018, the Company received RMB10.0 million (equivalent to US$1.5 million) each from three senior management employees (Messers Junjie Ma, Yuchong Jia, Guangjun Jiao) of Sichuan Xinda as interest-free advances to Sichuan Xinda. During the nine-month period ended September 30, 2018, the Company also received RMB29.1 million (equivalent to US$4.2 million) from a senior management employee (Mr. Rujun Dai) of HLJ Xinda Group as interest-free advances to HLJ Xinda Group.
[3]	During the nine-month period ended September 30, 2019, the Company received RMB31.0 million (equivalent to US$4.5 million) from Qingwei Ma, the Chief Operating Officer of the Company, as interest-free advances to the Company, and repaid RMB5.0 million (equivalent to US$0.7 million). As of September 30, 2019, the amounts due to Mr. Qingwei Ma was RMB26.0 million (equivalent to US$3.7 million).

Income tax (Narrative) (Details

Income tax (Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2014
Income Tax [Line Items]
PRC statutory income tax rate	25.00%
Effective income tax rate	14.80%	12.90%
Change in Effective income tax rate	14.80%	12.90%
Unrecognized tax benefits	$ 33,663,442		$ 5,578,390
Unrecognized tax benefits accrued	3,572,637
Accrued interest reserved	3,116,216
Interest relating to unrecognized tax benefits	$ 12,376,126		$ 4,351,145
Percentage of additional deduction of major PRC operating entities	75.00%
Subsidiary One [Member]
Income Tax [Line Items]
PRC statutory income tax rate	15.00%

Deferred Income (Details)

Deferred Income (Details)	1 Months Ended		9 Months Ended
	Jan. 31, 2015USD ($)	Jan. 31, 2015CNY (¥)	Sep. 30, 2019USD ($)	Sep. 30, 2019CNY (¥)	Sep. 30, 2019CNY (¥)
Fund Support Agreement With Shunqing Government [Member]
Deferred Revenue Arrangement [Line Items]
Government grant, agreement amount | $	$ 49,500,000		$ 13,800,000
Government grant related to construction in the form of repayment of bank loan on behalf of the Company by the government | $			3,600,000
Government grant related to the construction of Sichuan plant in the form of restricted cash | $
Government grant, funds received till date | $			47,100,000
Additional government grant received | $			5,100,000
Additional government grant received recognized as other income | $			2,300,000
Fund Support Agreement With Shunqing Government [Member] | China, Yuan Renminbi [Member]
Deferred Revenue Arrangement [Line Items]
Government grant, agreement amount | ¥		¥ 350,000,000		¥ 97,100,000
Government grant related to construction in the form of repayment of bank loan on behalf of the Company by the government | ¥				25,500,000
Government grant related to the construction of Sichuan plant in the form of restricted cash | ¥
Government grant, funds received till date | ¥					¥ 333,200,000
Additional government grant received | ¥				36,000,000
Additional government grant received recognized as other income | ¥				¥ 16,400,000
Ministry of Finance of the People's Republic of China [Member]
Deferred Revenue Arrangement [Line Items]
Government grant, funds received till date | $			900,000
Ministry of Finance of the People's Republic of China [Member] | China, Yuan Renminbi [Member]
Deferred Revenue Arrangement [Line Items]
Government grant, funds received till date | ¥					6,400,000
Ministry of Science and Technology [Member]
Deferred Revenue Arrangement [Line Items]
Government grant, funds received till date | $			300,000
Ministry of Science and Technology [Member] | China, Yuan Renminbi [Member]
Deferred Revenue Arrangement [Line Items]
Government grant, funds received till date | ¥					2,200,000
Harbin Bureau of Finance for Biomedical [Member]
Deferred Revenue Arrangement [Line Items]
Government grant, funds received till date | $			$ 6,400,000
Harbin Bureau of Finance for Biomedical [Member] | China, Yuan Renminbi [Member]
Deferred Revenue Arrangement [Line Items]
Government grant, funds received till date | ¥					¥ 45,000,000

Other non-current liabilities_2

Other non-current liabilities (Narrative) (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2017
Other Liabilities, Noncurrent [Abstract]
Current income tax expense-US	$ 17,031,636	$ 17,031,636	$ 70,965,148

Other non-current liabilities_3

Other non-current liabilities (Details) - USD ($)		Sep. 30, 2019	Dec. 31, 2018
Other Liabilities, Noncurrent [Abstract]
Income tax payable-noncurrent	[1]	$ 89,976,096	$ 92,461,068
Deferred income tax liabilities		5,062,698	6,716,921
Others			2,395,783
Total other non-current liabilities		$ 95,038,794	$ 101,573,772
[1]	Income tax payable-noncurrent represents the repatriation tax, the accumulative balance of unrecognized tax benefits since 2015 and related accrued interest. According to the Tax Cuts and Jobs Act enacted on December 22, 2017, the management recognized the amount of U.S. tax corporate income tax is US$70,965,148 based on the deemed repatriation to the United States of accumulated earnings mandated by the U.S. tax reform, US$17,031,636 of which due payable in 2018 and 2019 was classified as current liabilities.

Redeemable Series D convertib_2

Redeemable Series D convertible preferred stock (Details)	9 Months Ended
	Sep. 30, 2019shares
Common Stock [Member]
Stockholders Equity [Line Items]
Series D Preferred Stock converted to common stock, shares	16,000,000

Stockholders' equity (Details)

Stockholders' equity (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Stockholders Equity [Line Items]
Balance as of January 1, 2019			$ 748,917,428
Net income	$ 16,965,213	$ 8,964,941	68,057,245	$ 55,288,920
Series D Preferred Stock converted to common stock	3,834,137	$ 2,140,971	15,967,004	$ 13,257,752
Other comprehensive income - Foreign currency translation adjustment, net of nil income taxes			(24,732,543)
Balance as of September 30, 2019	889,818,595		889,818,595
Preferred Stock [Member] | Series B Preferred Stock [Member]
Stockholders Equity [Line Items]
Balance as of January 1, 2019			$ 100
Balance as of January 1, 2019, shares			1,000,000
Net income
Series D Preferred Stock converted to common stock
Series D Preferred Stock converted to common stock, shares
Other comprehensive income - Foreign currency translation adjustment, net of nil income taxes
Balance as of September 30, 2019	$ 100		$ 100
Balance as of September 30, 2019, shares	1,000,000		1,000,000
Common Stock [Member]
Stockholders Equity [Line Items]
Balance as of January 1, 2019			$ 5,097
Balance as of January 1, 2019, shares			50,948,841
Net income
Series D Preferred Stock converted to common stock			$ 1,600
Series D Preferred Stock converted to common stock, shares			16,000,000
Other comprehensive income - Foreign currency translation adjustment, net of nil income taxes
Balance as of September 30, 2019	$ 6,697		$ 6,697
Balance as of September 30, 2019, shares	66,948,841		66,948,841
Treasury Stock [Member]
Stockholders Equity [Line Items]
Balance as of January 1, 2019			$ (92,694)
Net income
Series D Preferred Stock converted to common stock
Other comprehensive income - Foreign currency translation adjustment, net of nil income taxes
Balance as of September 30, 2019	$ (92,694)		(92,694)
Additional Paid-in Capital [Member]
Stockholders Equity [Line Items]
Balance as of January 1, 2019			86,633,582
Net income
Series D Preferred Stock converted to common stock			97,574,865
Other comprehensive income - Foreign currency translation adjustment, net of nil income taxes
Balance as of September 30, 2019	184,208,447		184,208,447
Retained Earnings [Member]
Stockholders Equity [Line Items]
Balance as of January 1, 2019			717,103,890
Net income			68,057,245
Series D Preferred Stock converted to common stock
Other comprehensive income - Foreign currency translation adjustment, net of nil income taxes
Balance as of September 30, 2019	785,161,135		785,161,135
Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders Equity [Line Items]
Balance as of January 1, 2019			(54,732,547)
Net income
Series D Preferred Stock converted to common stock
Other comprehensive income - Foreign currency translation adjustment, net of nil income taxes			(24,732,543)
Balance as of September 30, 2019	$ (79,465,090)		$ (79,465,090)

Stock based compensation (Narra

Stock based compensation (Narrative) (Details) - General and administrative expenses [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Nonvested Shares [Member]
Stock based compensation expense		$ 45,339		$ 2,675,115
Stock options Shares [Member]
Stock based compensation expense		$ 595,044		$ 595,044

Earnings per share (Calculation

Earnings per share (Calculation of Basic and Diluted Earnings Per Share) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net income	$ 16,965,213	$ 8,964,941	$ 68,057,245	$ 55,288,920
Less: Earnings allocated to participating Series D convertible preferred stocks	(3,834,137)	(2,140,971)	(15,967,004)	(13,257,752)
Less: Earnings allocated to participating nonvested shares		(8,904)		(106,113)
Net income for basic and diluted earnings per share	$ 13,131,076	$ 6,815,066	$ 52,090,241	$ 41,925,055
Denominator:
Denominator for basic earnings per share	51,818,406	50,930,653	51,241,881	50,596,880
Dilutive effect of outstanding share options		32,944		32,944
Denominator for diluted earnings per share	51,818,406	50,963,597	51,241,881	50,629,824
Earnings per share:
Basic and diluted	$ 0.25	$ 0.13	$ 1.02	$ 0.83

Earnings per share (Summary of

Earnings per share (Summary of Potentially Dilutive Securities) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Convertible Preferred Stock Series D [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issuable upon conversion of stock	15,130,435	16,000,000	15,706,960	16,000,000

Commitments and contingencies (

Commitments and contingencies (Narrative) (Details)

Jun. 10, 2017USD ($)

Jun. 10, 2017CNY (¥)

Jun. 09, 2017USD ($)

Jun. 09, 2017CNY (¥)

Sep. 06, 2016USD ($)

Sep. 06, 2016CNY (¥)

May 31, 2019AED (د.إ)

Sep. 30, 2018USD ($)

Sep. 30, 2018CNY (¥)

Jul. 31, 2018T

Jun. 25, 2018USD ($)T

Jun. 25, 2018CNY (¥)T

Mar. 31, 2018USD ($)

Mar. 31, 2018CNY (¥)

Jul. 21, 2017T

Mar. 31, 2017USD ($)

Mar. 31, 2017CNY (¥)

Mar. 30, 2017USD ($)

Mar. 30, 2017CNY (¥)

Mar. 17, 2017T

Feb. 20, 2017USD ($)

Feb. 20, 2017CNY (¥)

Nov. 15, 2016USD ($)

Nov. 15, 2016CNY (¥)

Oct. 20, 2016USD ($)

Oct. 20, 2016CNY (¥)

Apr. 30, 2015USD ($)

Apr. 30, 2015AED (د.إ)

Mar. 31, 2013USD ($)

Mar. 31, 2013CNY (¥)

Apr. 15, 2019CNY (¥)

Sep. 30, 2019USD ($)T

Sep. 30, 2019CNY (¥)T

Dec. 31, 2018USD ($)

Dec. 31, 2018CNY (¥)

Dec. 25, 2018CNY (¥)

Dec. 31, 2017USD ($)

Dec. 31, 2017CNY (¥)

Sep. 30, 2019CNY (¥)

Sep. 30, 2019AED (د.إ)

May 31, 2019USD ($)

Apr. 15, 2019USD ($)

Apr. 15, 2019CNY (¥)

Dec. 25, 2018USD ($)

Dec. 25, 2018CNY (¥)

Jul. 12, 2018USD ($)

Jul. 12, 2018CNY (¥)

Jun. 30, 2018USD ($)

Jun. 21, 2018USD ($)

Jun. 21, 2018CNY (¥)

Dec. 31, 2017CNY (¥)

Nov. 15, 2016CNY (¥)

Sep. 06, 2016CNY (¥)

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

$ 436,326,962

$ 530,636,319

Xinda Holdings HK [Member]

Long-term Purchase Commitment [Line Items]

Purchase Obligation

7,700,000

Xinda Holdings HK [Member] | Longjiang Bank, Harbin Branch [Member]

Long-term Purchase Commitment [Line Items]

Loan amount

$ 113,100,000

Xinda Holdings HK [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Purchase Obligation | ¥

¥ 54,800,000

Xinda Holdings HK [Member] | China, Yuan Renminbi [Member] | Longjiang Bank, Harbin Branch [Member]

Long-term Purchase Commitment [Line Items]

Loan amount | ¥

¥ 800,000,000

Interest rate

6.09%

Obliged repay | ¥

¥ 800,000,000

Xinda Holdings HK [Member] | Property, Plant and Equipment [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

$ 254,500,000

Xinda Holdings HK [Member] | Property, Plant and Equipment [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

¥ 1,800,000,000

Xinda Holdings HK [Member] | Working Capital [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

$ 84,800,000

Xinda Holdings HK [Member] | Working Capital [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

¥ 600,000,000

Sichuan Xinda [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

17,100,000

Sichuan Xinda [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

10,400,000

Sichuan Xinda [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

120,900,000

Sichuan Xinda [Member] | China, Yuan Renminbi [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

74,000,000

Sichuan Xinda [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

$ 2,400,000

243,500,000

Purchase Obligation

$ 200,000

900,000

Prepayments to equipment suppliers

$ 17,100,000

1,300,000

$ 241,800,000

Bio-composite material | T

300,000

Sichuan Xinda [Member] | Equipment [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

10,400,000

Sichuan Xinda [Member] | Equipment [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

¥ 17,000,000

¥ 1,722,900,000

Purchase Obligation | ¥

6,000,000

¥ 1,600,000

Prepayments to equipment suppliers | ¥

9,400,000

¥ 1,710,100,000

¥ 120,900,000

Sichuan Xinda [Member] | Equipment [Member] | China, Yuan Renminbi [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers | ¥

¥ 74,000,000

Peaceful [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

[1]

16,860,609

$ 4,936,983

Peaceful [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

$ 12,700,000

7,900,000

Prepayments to equipment suppliers

4,800,000

$ 18,800,000

Peaceful [Member] | Equipment [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

¥ 89,800,000

55,900,000

Prepayments to equipment suppliers | ¥

33,900,000

Peaceful [Member] | Warehouse Construction Contract [Member] | United Arab Emirates, Dirhams

Long-term Purchase Commitment [Line Items]

Total consideration | د.إ

د.إ 18,800,000

Purchase Obligation | د.إ

د.إ 6,700,000

Beijin Construction [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

[2]

6,670,735

6,867,269

Beijin Construction [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

$ 3,400,000

$ 400,000

$ 33,600,000

Purchase Obligation

20,300,000

Beijin Construction [Member] | Equipment [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

¥ 23,800,000

¥ 2,900,000

¥ 237,600,000

Purchase Obligation | ¥

143,400,000

Hailezi [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to equipment suppliers

[3]

412,405,158

502,087,116

Prepayments to be refunded from termination of contracts

$ 1,800,000

Hailezi [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Prepayments to be refunded from termination of contracts | ¥

¥ 12,400,000

Hailezi [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

$ 317,100,000

Prepayments to equipment suppliers

$ 87,900,000

Prepayments to be refunded from termination of contracts

$ 241,000,000

$ 241,000,000

Hailezi [Member] | Equipment [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

¥ 2,242,800,000

Prepayments to equipment suppliers | ¥

¥ 621,600,000

Prepayments to be refunded from termination of contracts | ¥

¥ 1,704,900,000

¥ 1,704,900,000

Hailezi [Member] | Warehouse Construction Contract [Member]

Long-term Purchase Commitment [Line Items]

Purchase Obligation

4,300,000

Hailezi [Member] | Warehouse Construction Contract [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Purchase Obligation | ¥

30,200,000

Harbin Hailezi Science and Technology Co. Ltd. ("Hailezi") [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

314,300,000

Purchase Obligation

300,000

Prepayments to equipment suppliers

2,500,000

Harbin Hailezi Science and Technology Co. Ltd. ("Hailezi") [Member] | Equipment [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

2,222,900,000

Purchase Obligation | ¥

1,900,000

Prepayments to equipment suppliers

18,000,000

Nanchong Project [Member] | Property, Plant and Equipment [Member]

Long-term Purchase Commitment [Line Items]

Bio-composite material | T

20,000

Nanchong Project [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

268,700,000

Purchase Obligation

26,900,000

Prepayments to equipment suppliers

241,800,000

Nanchong Project [Member] | Equipment [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

1,900,100,000

Purchase Obligation | ¥

190,000,000

Prepayments to equipment suppliers | ¥

1,710,100,000

HLJ Project [Member]

Long-term Purchase Commitment [Line Items]

Total capital expenditure

567,700,000

Investment in fixed assets

465,900,000

HLJ Project [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total capital expenditure | ¥

4,015,000,000

Investment in fixed assets | ¥

¥ 3,295,000,000

HLJ Project [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Purchase Obligation

63,500,000

Prepayments to equipment suppliers

42,500,000

$ 34,000,000

HLJ Project [Member] | Equipment [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Purchase Obligation | ¥

449,100,000

Prepayments to equipment suppliers | ¥

300,700,000

¥ 240,800,000

HLJ Xinda Group [Member]

Long-term Purchase Commitment [Line Items]

Purchase Obligation

2,700,000

HLJ Xinda Group [Member] | Longjiang Bank, Harbin Branch [Member]

Long-term Purchase Commitment [Line Items]

Loan amount

$ 70,700,000

HLJ Xinda Group [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Purchase Obligation | ¥

18,800,000

HLJ Xinda Group [Member] | China, Yuan Renminbi [Member] | Longjiang Bank, Harbin Branch [Member]

Long-term Purchase Commitment [Line Items]

Loan amount | ¥

¥ 500,000,000

Interest rate

6.09%

Obliged repay | ¥

¥ 500,000,000

HLJ Xinda Group [Member] | Property, Plant and Equipment [Member]

Long-term Purchase Commitment [Line Items]

Bio-composite material | T

100,000

HLJ Xinda Group [Member] | Equipment [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

$ 106,000,000

129,600,000

Prepayments to equipment suppliers

$ 130,200,000

$ 163,600,000

Bio-composite material | T

300,000

300,000

300,000

300,000

300,000

300,000

HLJ Xinda Group [Member] | Equipment [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

¥ 749,800,000

¥ 916,200,000

Prepayments to equipment suppliers | ¥

920,900,000

¥ 1,157,000,000

Falcon Red Eye Contracting Co LLC [Member] | Warehouse Construction Contract [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

$ 1,800,000

Purchase Obligation

$ 400,000

Falcon Red Eye Contracting Co LLC [Member] | Warehouse Construction Contract [Member] | United Arab Emirates, Dirhams

Long-term Purchase Commitment [Line Items]

Total consideration | د.إ

د.إ 6,700,000

Purchase Obligation | د.إ

د.إ 1,600,000

Beijing Fangyuan Decoration Engineering Co [Member] | Workshops and buildings [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

$ 200,000

$ 800,000

Purchase Obligation

500,000

Beijing Fangyuan Decoration Engineering Co [Member] | Workshops and buildings [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

300,000

Beijing Fangyuan Decoration Engineering Co [Member] | Workshops and buildings [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

¥ 1,200,000

¥ 5,800,000

Purchase Obligation | ¥

3,800,000

Beijing Fangyuan Decoration Engineering Co [Member] | Workshops and buildings [Member] | China, Yuan Renminbi [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

¥ 2,000,000

Beijing Zhonghongwufang Stone Co [Member] | Workshops and buildings [Member]

Long-term Purchase Commitment [Line Items]

Purchase Obligation

100,000

Beijing Zhonghongwufang Stone Co [Member] | Workshops and buildings [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Total consideration

$ 100,000

Beijing Zhonghongwufang Stone Co [Member] | Workshops and buildings [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Purchase Obligation | ¥

¥ 600,000

Beijing Zhonghongwufang Stone Co [Member] | Workshops and buildings [Member] | China, Yuan Renminbi [Member] | Construction in progress [Member]

Long-term Purchase Commitment [Line Items]

Total consideration | ¥

¥ 600,000

Shanghai Sales defaults on loans [Member]

Long-term Purchase Commitment [Line Items]

Material loss contingency

195,000,000

Shanghai Sales defaults on loans [Member] | Interest Expense [Member]

Long-term Purchase Commitment [Line Items]

Material loss contingency

$ 11,200,000

Shanghai Sales defaults on loans [Member] | China, Yuan Renminbi [Member]

Long-term Purchase Commitment [Line Items]

Material loss contingency | ¥

1,379,000

Shanghai Sales defaults on loans [Member] | China, Yuan Renminbi [Member] | Interest Expense [Member]

Long-term Purchase Commitment [Line Items]

Material loss contingency | ¥

¥ 79,200,000

[1]

On October 20, 2016, Sichuan Xinda entered into an equipment purchase contract with Peaceful Treasure Limited ("Peaceful") for a total consideration of RMB89.8 million (equivalent to US$12.7 million) to purchase certain production and testing equipment. The Company prepaid RMB33.9 million (equivalent to US$4.8 million) as of September 30, 2019.

[2]

Since November 15, 2016, Sichuan Xinda entered into decoration contracts with Sichuan Beijin Construction Engineering Company Limited ("Beijin Construction") to perform indoor and outdoor decoration work for a consideration of RMB264.3 million (equivalent to US$37.4 million). Pursuant to the contracts with Beijin Construction, Sichuan Xinda has prepaid RMB120.9 million (equivalent to US$17.1 million) as of September 30, 2019, of which RMB74.0 million (equivalent to US$10.4 million) was transferred to construction in progress.

[3]

On September 26, 2016 and February 28, 2017, HLJ Xinda Group entered into equipment purchase contracts with Hailezi for a total consideration of RMB782.2 million (equivalent to US$110.6 million) to purchase storage facility and other equipment, which will be used for upgrading the storage system of warehouse located in Harbin, China. Pursuant to the contract with Hailezi, HLJ Xinda Group prepaid RMB621.6 million (equivalent to US$87.9 million) during the first quarter of 2017. Due to a redesign of outdoor storage facility in June 2017, HLJ Xinda Group entered into a supplementary agreement with Hailezi, which decreased the original contract amount to RMB283.7 million (equivalent to US$40.1 million). Hailezi refunded RMB369.1 million (equivalent to US$52.2 million) to HLJ Xinda Group on June 22, 2017. In May 2019, HLJ Xinda Group has prepaid another RMB1.0 million (equivalent to US$0.1 million). As of September 30, 2019, HLJ Xinda Group has prepaid RMB253.5 million (equivalent to US$35.8 million).

Revenues (Details)

Revenues (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Sales Revenue By Product [Line Items]
Total Revenue	$ 373,159,091	$ 297,224,740	$ 1,137,698,978	$ 925,007,293
Modified Polyamide 66 PA66 [Member]
Sales Revenue By Product [Line Items]
Total Revenue	120,234,670	72,832,370	296,372,085	242,690,994
Modified Polyamide 6 PA6 [Member]
Sales Revenue By Product [Line Items]
Total Revenue	78,940,503	54,018,912	250,529,646	180,317,333
Plastic Alloy [Member]
Sales Revenue By Product [Line Items]
Total Revenue	66,353,485	76,511,378	200,901,936	234,487,071
Modified Polypropylene PP [Member]
Sales Revenue By Product [Line Items]
Total Revenue	32,666,069	60,923,190	110,518,373	158,280,180
Modified Acrylonitrile Butadiene Styrene ABS [Member]
Sales Revenue By Product [Line Items]
Total Revenue	12,437,078	6,299,771	40,662,342	23,128,606
Polyoxymethylenes POM [Member]
Sales Revenue By Product [Line Items]
Total Revenue	2,053,799	2,881,985	6,953,161	7,753,725
Polyphenylene Oxide PPO [Member]
Sales Revenue By Product [Line Items]
Total Revenue	5,490,232	2,425,361	31,482,628	13,215,599
Polylactide PLA [Member]
Sales Revenue By Product [Line Items]
Total Revenue	17,525,906	20,854,274	46,789,233	64,583,387
Polyethylene (PE) [Member]
Sales Revenue By Product [Line Items]
Total Revenue	4,103,483		7,707,560
Work in progress [Member]
Sales Revenue By Product [Line Items]
Total Revenue	33,062,822		145,362,837
Raw Materials [Member]
Sales Revenue By Product [Line Items]
Total Revenue	291,044	477,499	419,177	550,398
Distributors [Member]
Sales Revenue By Product [Line Items]
Total Revenue	312,919,940	292,507,429	918,602,515	911,068,381
Direct customers [Member]
Sales Revenue By Product [Line Items]
Total Revenue	59,948,107	4,239,812	218,677,286	13,388,514
Others [Member]
Sales Revenue By Product [Line Items]
Total Revenue	$ 291,044	$ 477,499	$ 419,177	$ 550,398

Gains on disposal of a subsid_2

Gains on disposal of a subsidiary (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gains on disposal of subsidiary			$ 518,491
Consideration for sales of Shanghai New Materials [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gains on disposal of subsidiary			$ 500,000

Leases (Narrative) (Details)

Leases (Narrative) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease term for land and office	expiring from 2022 through 2037
Weighted average remaining lease term	17 years 6 months
Weighted average discount rate	6.70%
Rental expenses incurred for operating leases of plant and equipment and office spaces		$ 2,455,509

Leases (Schedule of Lease Costs

Leases (Schedule of Lease Costs) (Details)	9 Months Ended
	Sep. 30, 2019USD ($)
Leases [Abstract]
Operating lease cost	$ 1,271,455
Short-term lease cost	432,124
Total lease costs	$ 1,703,579

Leases (Schedule of Future Mini

Leases (Schedule of Future Minimum Lease Commitments) (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Operating Leases
2019	$ 346,192
2020	1,386,124
2021	1,408,598
2022	1,408,979
2023	1,424,857
Thereafter	22,023,858
Total remaining lease payments	27,998,608
Less: Imputed interest	(12,094,615)
Total operating lease liabilities	15,903,993
Less: current portion	(1,390,531)
Non-current operating lease liabilities	$ 14,513,462
Weighted-average remaining lease term	17 years 6 months
Weighted-average discount rate	6.70%

Leases (Schedule of Supplementa

Leases (Schedule of Supplemental Disclosure of Cash Flow Information) (Details)	9 Months Ended
	Sep. 30, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,707,618
Right-of-use assets obtained in exchange for new lease liabilities:
Operating lease	$ 16,075,213

Leases (Schedule of Future Mi_2

Leases (Schedule of Future Minimum Annual Lease Payments) (Details)	Dec. 31, 2018USD ($)
Years ended December 31,
2019	$ 2,174,439
2020	1,486,007
2021	1,486,007
2022	1,446,251
2023	1,482,593
Thereafter	$ 21,176,139

Subsequent events (Details)

Subsequent events (Details) - Consortium of banks and financial institutions led by Standard Chartered Bank [Member] - USD ($)	Oct. 02, 2019	Sep. 30, 2019
Aggregated principal amount		$ 180,000,000
Subsequent Event [Member]
Aggregated principal amount	$ 135,000,000