The board of directors of WuXi AppTec Co., Ltd. announced that Mr. Chi YAO has resigned as (i) a joint company secretary of the Company ("Joint Company Secretary"); The Board further announces that Mr. Yuanzhou ZHANG has been appointed as Joint Company Secretary, Authorised Representative and Process Agent in replacement of Mr. Yao with effect from June 6, 2023. Mr. Zhang, aged 34, holds a Master's degree and is a Chinese national. He currently serves as the Senior Director of the Mergers and Acquisitions Department of the Company.

Mr. Zhang served as a Management Trainee and a Relationship Manager of the Global Banking Department in HSBC Bank (China) Company Limited from June 2013 to April 2016. From May 2016 to September 2018, he served as a Vice President of the Investment Banking Department in CSC Financial Co., Ltd. Since October 2018, Mr. Zhang has served various positions in the Company, including Investment Director of the Corporate Development and Investment Department, as well as Senior Director of the Mergers and Acquisitions Department. His primary responsibilities entail conducting industry mergers and acquisitions, equity investments and strategic collaborations which are aligned with core businesses of the Company.

Mr. Zhang obtained a Bachelor's degree in Economics from the Central University of Finance and Economics. He also obtained a Master's degree in Finance from the Olin Business School at Washington University in St. Louis in the United States.

Ms. CHEUNG Yuet Fan ("Ms. Cheung"), an existing joint company secretary of the Company, will continue with the role and act as the other Joint Company Secretary and Process Agent. Ms. Cheung is a director of Corporate Services of Tricor Services Limited, 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 multinational, private and offshore companies. Ms. Cheung obtained a Bachelor of Arts degree in Accountancy from City Polytechnic of Hong Kong (now known as City University of Hong Kong) in November 1993.