SinoMab BioScience Limited announces that Ms. WONG Pui Yin Peony has tendered her resignation as the company secretary of the Company with effect from 17 November 2022. The Board further announces that Ms. CHAN Sze Ting (``Ms. Chan'') has been appointed to replace Ms. Wong as the company secretary of the Company with effect from 17 November 2022. Ms. Chan is an associate director of the corporate services division of Tricor Services Limited, which is a global professional services supplier specializing in integrated business, corporate and investor services.

Ms. Chan has over 16 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. Chan is a Chartered Secretary (CS), a Chartered Governance Professional (CGP) and an Associate of both The Hong Kong Chartered Governance Institute (HKCGI) and The Chartered Governance Institute (CGI) in the United Kingdom. Ms. Chan holds a bachelor of arts from Hong Kong Polytechnic University and a bachelor's degree in law from the University of London, Britain.