The board of directors of WuXi Biologics (Cayman) Inc. announced that Ms. Cheng Pik Yuk ("Ms. Cheng") has resigned as a joint company secretary of the Company (the "Joint Company Secretary") and ceased to act as an authorized representative of the Company (the "Authorized Representative") as required under Rule 3.05 of the Rules Governing the Listing of Securities (the "Listing Rules") on The Stock Exchange of Hong Kong Limited (the "Stock Exchange") and agent for the service of process and notices in Hong Kong (the "Process Agent") under Rule 19.05(2) of the Listing Rules with effect from June 5, 2019. The Board further announced that Ms. Sham Ying Man ("Ms. Sham") has been appointed as the Joint Company Secretary, the Authorized Representative and the Process Agent in replacement of Ms. Cheng with effect from June 5, 2019. Mr. Huang Yue ("Mr. Huang") will continue to act as the other Joint Company Secretary. Ms. Sham is a manager of Corporate Services of Tricor Services Limited.