Qianyuanhao Biological Co., Ltd. QYH Biotech Co., Ltd. Nanjing Biopharmaceutical Factory (hereinafter referred to as “Nanjing Factory”) was established in 1931. It was originally the Central Government Animal Husbandry Experimental Institute of the National Government, and later one of the four major veterinary biological products manufacturing enterprises of the Ministry of Agriculture. It is the earliest enterprise engaged in animal husbandry experiment and livestock vaccine research and production in China. In July 2004, after the asset reorganization, it was renamed as Nanjing Biopharmaceutical Factory of QYH Biotech Co., Ltd.Qianyuanhao Biological Co., Ltd., which is the production base of freeze-dried vaccine of QYH Biotech Co., Ltd.Qianyuanhao Biological Co., Ltd