VOLUNTARY ANNOUNCEMENT - SYS6051 OBTAINS CLINICAL TRIAL APPROVAL IN CHINA

Hong Kong Exchanges and Clearing Limited and The Stock Excha nge of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoe ver for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this ann ouncement. CSPC PHARMACEUTICAL GROUP LIMITED (Incorporated in Hong Kong with limited liability) (Stock Code: 1093) ʮ ̡ VOLUNTARY ANNOUNCEMENT SYS6051 OBTAINS CLINICAL TRIAL APPROVAL IN CHINA The Board of Directors (the ‘‘Board ’’) of CSPC Pharmaceutical Group Limited (the ‘‘Company ’’, together with its subsidiaries, the ‘‘Group ’’) is pleased to announce that SYS6051 (the ‘‘Product ’’) developed by the Group has obtained approval from the Nation al Medical Products Administration of the People ’s Republic of China to conduct clinical trials in China. The Product is a human tissue factor (TF)-targeted antibody -drug conjugate that binds to tissue factor expressed on the surface of tumor cells, entering the cells t hrough endocytosis to release toxins and kill the tumor cells. The Product is applied as a Class 1 therapeut ic biological product. The indication for this approval is advanced solid tumors. Preclinical studie s demonstrated that the Product had good anti- tumor effects on a variety of cancers and is expected to exhib it favorable therapeutic effects in subsequent clinical trials. By Order of the Board CSPC Pharmaceutical Group Limited CAI Dong Chen Chairman Hong Kong, 15 April 2026 As at the date of this announcement, the Board comprises Mr. C AI Dong Chen, Dr. CAI Lei, Mr. WEI Qingjie, Mr. ZHANG Cuilong, Mr. WANG Zhenguo, Mr. WANG Huaiy u, Dr. LI Chunlei, Dr. YAO Bing, Mr. CAI Xin, Mr. CHEN Weiping, Mr. QU Zhiyong and Mr. ZHANG Yiw ei as Executive Directors; and Mr. WANG Bo, Mr. CHEN Chuan, Prof. WANG Hongguang, Mr. AU Chun Kwok Alan, Mr. LAW Cheuk Kin Stephen and Ms. LI Quan as Independent Non-executive Dir ectors.

The release as fetched from its publisher. irasia.com ↗