Exhibit 13.1
CERTIFICATION OF PERIODIC FINANCIAL REPORT
Pursuant to 18 U.S.C. Section 1350
In connection with the Annual Report of Siliconware Precision Industries Co., Ltd. on Form20-F for the year ended December 31, 2017 as filed with the SEC on the date hereof, I,Chi-Wen Tsai, the Chief Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C.§ 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:
| 1. | The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and |
| 2. | The information contained in the report fairly presents, in all material respects, the financial condition and results of operations of the company. |
Date: March 27, 2018
| By: | /s/Chi-Wen Tsai | |
| Name: | Chi-Wen Tsai | |
| Title: | Chief Executive Officer |
| * | A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to the company and will be retained by the company and furnished to the SEC or its staff upon request. |
