Natural Medicine Institute of Zhejiang YangShengTang

YangShengTang Natural Medicine Institute is the core research and development division of the YangShengTang Group, a prominent Chinese conglomerate. The institute focuses on the discovery and development of innovative vaccines and diagnostic tools, particularly those based on recombinant protein technology. It is best known for developing Hecolin, the world's first vaccine for Hepatitis E, and Cecolin, the first Chinese-developed HPV vaccine. Through a long-term strategic partnership with Xiamen University, the institute utilizes a proprietary E. coli-based expression platform to produce virus-like particles (VLPs). Its research outputs are primarily commercialized through its sister company, Beijing Wantai Biological Pharmacy.