Pacific Shuanglin Bio-pharmacy Co., Ltd. engages in the research, development, production, and sales of blood products in China. The company produces human serum albumin, human immunoglobulin, intravenous human immunoglobulin (pH4), hepatitis B human immunoglobulin, tetanus human immunoglobulin, rabies patient immunoglobulin, and human coagulation factor; it also provides investment, consultation, and technology promotion services for pharmaceutical and biotechnology development projects as well as electronic product information consultation. Pacific Shuanglin Bio-pharmacy operates primarily in the biopharmaceutical industry, targeting healthcare providers and patients requiring plasma-derived therapies, with plasma collection stations across regions including Guangdong and Guangxi provinces. Founded in 1993 and headquartered in Taiyuan, Shanxi province, the company listed on the Shenzhen Stock Exchange in 1996, originally as Yichun Construction Machinery Co., Ltd., underwent multiple restructurings, and adopted its current name on March 30, 2021. In June 2025, China National Biotec Group Company Limited signed an acquisition framework agreement to purchase a 21.03% controlling stake from Gongqingcheng Shengbang Yinghao Investment Partnership, marking a significant ownership change and potential integration with Beijing Tiantan Biological Products.