our manufacture, inner mongolia lichuan chemical co., ltd., was built in 1969. it is well-known by brand”bayan sodium sulphide” in the past several decades. now it is a high-tech enterprise and a first-level unit in inner mongolia autonomous region with the annually produces of sodium hydrosulfide 10,000 tons/year , industrial sodium sulfide 20,000 tons/year . our factory as our big supporter has passed the iso9001: 2000 quality system certification in 2002. the products enjoy a good reputation both in domestic and foreign markets due to continued good qulaity. it is not only sold well in china, but also far sold to southeast asia, the middle east, india and pakistan, africa, australia, south america and so on .