Changsha Weichuang Chemical Co., Ltd. was founded in the year of 2000, the head office and the department of exportation are in changsha, consists of two plants: no 1 chemical plant and no 2 chemical plant, occupying 28000 square meter, with fixed assets of RMB12 million. The plants location are closely connected with JINGGUANG railroad and JINGZHU highway, it has transport facilities, only need one hour from the plant to xinggang port of changsha and ten hours to huangpu port of guangzhou, it will save time to export in time. Employees 110, it is a professional producer in sodium under import the raw material in addition of input and import procession. Self import-export, its major item are sodium metabisulphite(8000mt/year), sodium thiosulpha(6000mt/year), sodium sulphite(5000mt/year). Ferrous sulfate(10000mt/year).