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[Advanced Semiconductor Engineering, Inc. September 28, 2015 An Open Letter to SPIL Shareholders from ASE To the Honorable Shareholders of Siliconware Precision Industries Co., Ltd.: Tender Offer Common Shares ADSs SPIL We would like to report the successful results of our tender offer (the “ Hon Hai” “Hon Hai Share Exchange EGM AOIs Amendment Acquisition and Disposition Procedures Amendment Unfortunately,] [Investor communication  The EGM agenda issued by SPIL on September 25, 2015 includes a proposal to increase the share capital of SPIL far in excess of the amount of shares needed for the proposed share swap with Hon Hai and may lead to significant dilution for all SPIL shareholders • SPIL is seeking to increase the number of shares] []

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