[PRELIMINARY PROXY STATEMENT OF THE COMPANY [ ], 2015 Shareholders of WuXi PharmaTech (Cayman) Inc. Re: Notice of Extraordinary General Meeting of Shareholders Dear Shareholder: You are cordially invited to attend an extraordinary general meeting of shareholders of WuXi PharmaTech (Cayman) Inc., an exempted company with limited liability incorporated under the laws of the Cayman Islands (the “Company”), to be] [EXECUTION VERSION STRICTLY PRIVATE AND CONFIDENTIAL To: Borrower WuXi Merger Limited (the “ c/o Codan Trust Company (Cayman) Limited Cricket Square, Hutchins Drive PO Box 2681 Grand Cayman, KY1-1111, Cayman Islands Attention: Ge Li 14 August Dear Sirs: Project Super – Commitment Letter Mandated Lead Arrangers Underwriters Facility We, Ping An Bank Co., Ltd. and Shanghai Pudong Development Bank Co.,] [EXECUTION VERSION STRICTLY PRIVATE AND CONFIDENTIAL To: Borrower Group & Cloud Limited (the “ 288 Fute Zhong Road Waigaoqiao Free Trade Zone Shanghai 200131, China Attention: Mr. Li Ge 14 August Dear Sirs: Project Super – Commitment Letter Mandated Lead Arrangers Underwriters Facility We, Ping An Bank Co., Ltd. and Shanghai Pudong Development Bank Co., Ltd. (the “ Holdco Parent] [EXECUTION VERSION CONFIDENTIAL EQUITY COMMITMENT LETTER August 14, 2015 New WuXi Life Science Holdings Limited New WuXi Life Science Limited Address: 288 Fute Zhong Road The China (Shanghai) Pilot Free Trade Zone Shanghai 200131 People’s Republic of China Attention: Ge Li Facsimile: +86-21-50463718 Ladies and Gentlemen: Sponsor Holdco Merger Agreement Company Parent Merger Sub Merger Other Sponsor Other Sponsor Equity] [EXECUTION VERSION CONFIDENTIAL EQUITY COMMITMENT LETTER August 14, 2015 New WuXi Life Science Holdings Limited New WuXi Life Science Limited Address: 288 Fute Zhong Road The China (Shanghai) Pilot Free Trade Zone Shanghai 200131 People’s Republic of China Attention: Ge Li Facsimile: +86-21-50463718 Ladies and Gentlemen: Sponsor Holdco Merger Agreement Company Parent Merger Sub Merger Other Sponsor Other Sponsor Equity] [EXECUTION VERSION CONFIDENTIAL EQUITY COMMITMENT LETTER August 14, 2015 New WuXi Life Science Holdings Limited New WuXi Life Science Limited Address: 288 Fute Zhong Road The China (Shanghai) Pilot Free Trade Zone Shanghai 200131 People’s Republic of China Attention: Ge Li Facsimile: +86-21-50463718 Ladies and Gentlemen: Sponsor Holdco Merger Agreement Company Parent Merger Sub Merger Other Sponsor Other Sponsor Equity] [EXECUTION VERSION CONFIDENTIAL EQUITY COMMITMENT LETTER August 14, 2015 New WuXi Life Science Holdings Limited New WuXi Life Science Limited Address: 288 Fute Zhong Road The China (Shanghai) Pilot Free Trade Zone Shanghai 200131 People’s Republic of China Attention: Ge Li Facsimile: +86-21-50463718 Ladies and Gentlemen: Sponsor Holdco Merger Agreement Company Parent Merger Sub Merger Other Sponsor Other Sponsor Equity] [EXECUTION VERSION CONFIDENTIAL EQUITY COMMITMENT LETTER August 14, 2015 New WuXi Life Science Holdings Limited New WuXi Life Science Limited Address: 288 Fute Zhong Road The China (Shanghai) Pilot Free Trade Zone Shanghai 200131 People’s Republic of China Attention: Ge Li Facsimile: +86-21-50463718 Ladies and Gentlemen: Sponsor Holdco Merger Agreement Company Parent Merger Sub Merger Other Sponsor Other Sponsor Equity] [EXECUTION VERSION CONFIDENTIAL EQUITY COMMITMENT LETTER August 14, 2015 New WuXi Life Science Holdings Limited New WuXi Life Science Limited Address: 288 Fute Zhong Road The China (Shanghai) Pilot Free Trade Zone Shanghai 200131 People’s Republic of China Attention: Ge Li Facsimile: +86-21-50463718 Ladies and Gentlemen: Sponsor Holdco Merger Agreement Company Parent Merger Sub Merger Other Sponsor Other Sponsor Equity] [EXECUTION VERSION CONFIDENTIAL EQUITY COMMITMENT LETTER August 14, 2015 Group & Cloud Limited Address: 288 Fute Zhong Road The China (Shanghai) Pilot Free Trade Zone Shanghai 200131 People’s Republic of China Attention: Ge Li Facsimile: +86-21-50463718 Ladies and Gentlemen: Borrower Shareholder Borrower This letter agreement sets forth the commitment of Dr. Ge Li (the “ Management Debt Commitment Letter Underwriter] [EXECUTION VERSION CONSORTIUM AGREEMENT THIS CONSORTIUM AGREEMENT Agreement Chairman ABG Boyu Initial Sponsors Principal Consortium Member Party “Parties WHEREAS Transaction NYSE Company Exchange Act WHEREAS Holdco Merger Sub Closing Merger Surviving Company WHEREAS Schedule A Proposal Company Board WHEREAS Special Committee Merger Agreement NOW, THEREFORE 1. Proposal; Debt Financing; Holdco Ownership Participation in Transaction 1.1 Proposal 1.2 Debt Financing 1.3] [EXECUTION VERSION AMENDED AND RESTATED CONSORTIUM AGREEMENT THIS AMENDED AND RESTATED CONSORTIUM AGREEMENT Agreement Chairman ABG Boyu Initial Sponsors Temasek Hillhouse PRC Ping An Principal Consortium Member Principal Consortium Members Party Parties WHEREAS Original Consortium Agreement Transaction Company NYSE Exchange Act WHEREAS Holdco Merger Sub Closing Merger Surviving Company WHEREAS Schedule A Proposal Company Board WHEREAS Special Committee Merger Agreement] [EXECUTION VERSION AMENDMENT TO THE AMENDED AND RESTATED CONSORTIUM AGREEMENT AMENDMENT TO THE AMENDED AND RESTATED CONSORTIUM AGREEMENT Amendment Chairman ABG Boyu Temasek Hillhouse Ping An Original Parties G&C New ABG New Hillhouse New Ping An This WHEREAS Agreement The parties hereto hereby agree to amend the Agreement as follows: 2. G&C is hereby admitted as a Sponsor. mutatis mutandis] [EXECUTION VERSION CONFIDENTIAL INTERIM INVESTORS AGREEMENT Agreement Chairman Management Roll-over Entity ABG Boyu Temasek Hillhouse Ping An Equity Sponsor Equity Sponsors Investor Investors Holdco Parent Merger Sub Parties Party This Interim Investors Agreement (this “ RECITALS Consortium Agreement Company Merger Agreement Merger Transactions WHEREAS, on the date hereof, Parent, Merger Sub and the Company have executed an Agreement and Plan] [EXECUTION VERSION CONFIDENTIAL LIMITED GUARANTEE LIMITED GUARANTEE, Limited Guarantee Guarantor Guaranteed Party 1. GUARANTEE. Merger Agreement Parent Merger Sub Merger Guaranteed Percentage Section 8.06(b) Section 8.06(c) Section 8.06(f) Section 6.07(d) Section 8.06(h) provided Cap Schedule A Other Guarantor Other Guarantee Sections 8.06(b) 8.06(c) 8.06(f) 6.07(d) -1- 2. NATURE OF GUARANTEE. Section 8 3. Section 8 -2- Equity Commitment Letter Equity] [EXECUTION VERSION CONFIDENTIAL LIMITED GUARANTEE LIMITED GUARANTEE, Limited Guarantee Guarantor Guaranteed Party 1. GUARANTEE. Merger Agreement Parent Merger Sub Merger Guaranteed Percentage Section 8.06(b) Section 8.06(c) Section 8.06(f) Section 6.07(d) Section 8.06(h) provided Cap Schedule A Other Guarantor Other Guarantee Sections 8.06(b) 8.06(c) 8.06(f) 6.07(d) -1- 2. NATURE OF GUARANTEE. Section 8 3. Section 8 -2- Equity Commitment Letter Equity] [EXECUTION VERSION CONFIDENTIAL LIMITED GUARANTEE LIMITED GUARANTEE, Limited Guarantee Guarantor Guaranteed Party 1. GUARANTEE. Merger Agreement Parent Merger Sub Merger Guaranteed Percentage Section 8.06(b) Section 8.06(c) Section 8.06(f) Section 6.07(d) Section 8.06(h) provided Cap Schedule A Other Guarantor Other Guarantee Sections 8.06(b) 8.06(c) 8.06(f) 6.07(d) -1- 2. NATURE OF GUARANTEE. Section 8 3. Section 8 -2- Equity Commitment Letter Equity] [EXECUTION VERSION CONFIDENTIAL LIMITED GUARANTEE LIMITED GUARANTEE Limited Guarantee Guarantor Guaranteed Party 1. GUARANTEE. Merger Agreement Parent Merger Sub Merger Guaranteed Percentage Section 8.06(b) Section 8.06(c) Section 8.06(f) Section 6.07(d) Section 8.06(h) provided Cap Schedule A Other Guarantor Other Guarantee Sections 8.06(b) 8.06(c) 8.06(f) 6.07(d) -1- 2. NATURE OF GUARANTEE. Section 8 3. Section 8 -2- Parent or Merger Sub] [EXECUTION VERSION CONFIDENTIAL LIMITED GUARANTEE LIMITED GUARANTEE Limited Guarantee Guarantor Guaranteed Party 1. GUARANTEE. Merger Agreement Parent Merger Sub Merger Guaranteed Percentage Section 8.06(b) Section 8.06(c) Section 8.06(f) Section 6.07(d) Section 8.06(h) provided Cap Schedule A Other Guarantor Other Guarantee Sections 8.06(b) 8.06(c) 8.06(f) 6.07(d) -1- 2. NATURE OF GUARANTEE. Section 8 3. Section 8 -2- Equity Commitment Letter Equity] [EXECUTION VERSION CONFIDENTIAL LIMITED GUARANTEE LIMITED GUARANTEE, Limited Guarantee Guarantor Guaranteed Party 1. GUARANTEE. Merger Agreement Parent Merger Sub Merger Guaranteed Percentage Section 8.06(b) Section 8.06(c) Section 8.06(f) Section 6.07(d) Section 8.06(h) provided Cap Schedule A Other Guarantor Other Guarantee Sections 8.06(b) 8.06(c) 8.06(f) 6.07(d) -1- 2. NATURE OF GUARANTEE. Section 8 3. Section 8 -2- Equity Commitment Letter Equity] [CREDIT SUISSE Project Super Discussion Materials for the Special Committee of the Board of Directors Confidential / Draft July 13, 2015 PRELIMINARY | SUBJECT TO FURTHER REVIEW AND EVALUATION These materials may not be used or relied upon for any purpose other than as specifically contemplated by a written agreement with Credit Suisse AG or its Affiliates (hereafter “Credit Suisse”).] [CREDIT SUISSE Project Super Presentation to the Special Committee of the Board of Directors Confidential August 13, 2015 These materials may not be used or relied upon for any purpose other than as specifically contemplated by a written agreement with Credit Suisse AG or its Affiliates (hereafter “Credit Suisse”). Table of contents 1. Transaction overview 2. Super public market perspectives] []