Hunan Jiuzhitang Siqi Biological Pharmaceutical

Hunan Jiuzhitang Siqi Biological Pharmaceutical is a specialized subsidiary of the prominent Chinese pharmaceutical group Jiuzhitang, focusing on the development and production of biological immunomodulators. The company's flagship product is Siqikang (BCG Polysaccharide Nucleic Acid), a widely recognized biologic in China used to enhance immune function and treat chronic respiratory and dermatological conditions. Operating from its GMP-certified facilities in Changsha, the company integrates research, manufacturing, and commercialization to serve the domestic immunology market. Its business model leverages biological extraction and immunomodulation technologies to address unmet needs in chronic disease management.