Hunan Huateng Pharmaceutical Co., Ltd. , founded in August 2013​, is a high-tech enterprise dedicated to the research and development and production of high-end biomedical chemical products, as well as the development of precision-targeted anti-tumor drugs. The company develops and produces thousands of products, including monodisperse and polydisperse PEG derivatives, high-end biochemical reagents, pharmaceutical intermediates, APIs, preparations and targeted anti-tumor drugs. 

Official website: https://en.huatengsci.com/