Changsha Tongway Imp & Exp Trade Co., Ltd. is a industrial and trade company, combining R&D, production and trade as a whole body. It has two branches, Yueyang Zhongnan Chemical Industry Co., Ltd. and Changsha Hongtian Chemical Industry Co., Ltd. The company mainly engage in production and sale of Sodium Metabisulfite, Manfanous sulfate, Zinc sulfate, Sodium Bicarbonate, etc. Adhering to the principle of "Win the market with Quality; Make friends with Honest." , we supply the high quality chemical raw materials. We welcome all from the world to reach a bright future with hand in hand.