Attended the signing ceremony of strategic cooperation between Kexing Kexing and Institute of Process Engineering of China Academy of Sciences. Yin Weidong, born in 1964, is the chairman of biotechnology of Kexing Holdings. As of March 9, 2023, he attended the signing ceremony of strategic cooperation between Kexing Kexing and Institute of Process Engineering of China Academy of Sciences. Yin Weidong is one of the earliest people who isolated hepatitis A virus in China. In 2003, Yin Weidong was the project leader of the national major project "Development of inactivated SARS vaccine".