[TABLE OF CONTENTS [TO BE UPDATED] Page INTRODUCTION 1 2 PART I. ITEM 1. IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS 3 ITEM 2. OFFER STATISTICS AND EXPECTED TIMETABLE 3 ITEM 3. KEY INFORMATION 3 ITEM 4. INFORMATION ON THE COMPANY 26 ITEM 4A. UNRESOLVED STAFF COMMENTS 44 ITEM 5. OPERATING AND FINANCIAL REVIEW AND PROSPECTS 44 ITEM 6. DIRECTORS,] [LIST OF SUBSIDIARIES • WuXi AppTec (BVI) Inc., incorporated in British Virgin Islands; • WuXi AppTec Co., Ltd., incorporated in People’s Republic of China (“PRC”); • WuXi AppTec (Shanghai) Co., Ltd., incorporated in PRC; • Shanghai SynTheAll PharmaTech Co., Ltd., incorporated in PRC; • WuXi AppTec (Suzhou) Co., Ltd., incorporated in PRC; • WuXi AppTec (Tianjin) Co., Ltd. , incorporated] [Certification by the Chief Executive Officer I, Ge Li, certify that: 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered] [Certification by the Chief Financial Officer I, Edward Hu, certify that: 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered] [Section 906 of the Sarbanes-Oxley Act of 2002 Ge Li Chief Executive Officer] [Certification by the Chief Financial Officer Edward Hu Chief Financial Officer] [April 20, 2012 WuXi PharmaTech (Cayman) Inc. 288 Fute Zhong Road Waigaoqiao Free Trade Zone Shanghai 200131 People’s Republic of China RE: WUXI PHARMATECH (CAYMAN) INC. Dear Sirs/Madams, Company We have acted as legal advisors as to the laws of the People’s Republic of China to WuXi PharmaTech (Cayman) Inc., an exempted limited liability company incorporated in the Cayman Islands] [CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No. 333-146730 on Form S-8 and Registration Statement No. 333-161757 on Form F-3 of our reports dated April 20, 2012, relating to the consolidated financial statements and financial statement schedule of WuXi PharmaTech (Cayman) Inc. and its subsidiaries, and the effectiveness of WuXi]