CStone Pharmaceuticals announces that Mr. Kenneth Walton Hitchner III has been appointed as a non-executive Director with effect from December 10, 2021. The Board has also received the letter of resignation from Mr. Qun Zhao to resign as a non-executive Director with effect from the Effective Date. Mr. Kenneth Walton Hitchner III, aged 61, has more than 30 years of experience in corporate finance. He had served as the Chairman and Chief Executive Officer of The Goldman Sachs Group Inc. in Asia Pacific Ex-Japan before his retirement in 2019. He was also a member of Goldman Sachs' Management Committee and co-chaired its Asia Pacific Management Committee.