The board of directors of WuXi AppTec Co., Ltd. announced that due to work reallocation, Ms. Yuen Wing Yan Winnie ceased to act as a joint company secretary of the Company; an authorised representative of the Company pursuant to Part 16 of the Companies Ordinance (Chapter 622 of the Laws of Hong Kong) (the "Authorised Representative"); and (iii) an agent for service of process in Hong Kong under Rule 19A.13(2) of the Rules Governing the Listing of Securities on the Main Board of The Stock Exchange of Hong Kong Limited (the "Stock Exchange") (the "Listing Rules") (the "Process Agent") with effect from March 24, 2020. Ms. Yuen confirmed that she has no disagreement with the Board and there is no matter relating to her cessation that needs to be brought to the attention of the shareholders of the Company or the Stock Exchange. The Board further announced that Ms. Siu Wing Kit ("Ms. Siu") has been appointed as a Joint Company Secretary, the Authorised Representative and the Process Agent in replacement of Ms. Yuen with effect from March 24, 2020. Ms. Siu is a senior manager of corporate services of Tricor Services Limited. She has over 20 years of experience in the corporate secretarial field and has been handling the company secretarial compliance works of Hong Kong listed companies, private and offshore companies.