Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Amendment No. 1 to Registration Statement No. 333-214752 on Form F-4 of our reports dated April 28, 2016, relating to the consolidated financial statements of Advanced Semiconductor Engineering, Inc. and subsidiaries (collectively, the “Group”) (which report expresses an unqualified opinion and includes an explanatory paragraph referring to the convenience translation of New Taiwan dollar amounts into U.S. dollar amounts), and the effectiveness of the Group’s internal control over financial reporting, appearing in the Annual Report on Form 20-F of the Group for the year ended December 31, 2015, and to the reference to us under the heading “Experts” in this proxy statement/prospectus, which is part of this Registration Statement.

/s/Deloitte & Touche 

Taipei, Taiwan 

Republic of China

January 6, 2017