Zhangjiagang Hengsheng Pharmaceutical Co.,Ltd, was founded in September 2006. It was invested by Jiangsu Ruihua Investment Development Co., Ltd. and Zhangjiagang Hengchang Investment Development Co., Ltd. It is the new and high tech enterprise in Jiangsu Province, Top Ten Enterprise of Veterinary and Crude Drug in China. The enterprise has passed the National GMP Certification in December 2004.