The board of directors of WuXi AppTec Co., Ltd. announced that Ms. Siu Wing Kit has resigned as (i) a joint company secretary of the Company, an authorised representative of the Company pursuant to Part 16 of the Companies Ordinance, and 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 with effect from May 25, 2022. Ms. Siu confirmed that she has no disagreement with the Board and there is no matter relating to her resignation that needs to be brought to the attention of the shareholders of the Company or the Stock Exchange. The Board further announces that Ms. Cheung Yuet Fan has been appointed as a Joint Company Secretary, the Authorised Representative and the Process Agent in replacement of Ms. Siu with effect from May 25, 2022.

Ms. Cheung is a director of Corporate Services of Tricor, a global professional services provider specialising in integrated business, corporate and investor services. Ms. Cheung is a Chartered Secretary, a Chartered Governance Professional and a Fellow of both The Hong Kong Chartered Governance Institute and The Chartered Governance Institute. Ms. Cheung has over 25 years of experience in the corporate secretarial field and has been providing professional corporate services to Hong Kong listed companies as well as multi-national, private and offshore companies.

Ms. Cheung obtained a Bachelor of Arts degree in Accountancy from City Polytechnic of Hong Kong in November 1993.