Tangshan Tianshi Agriculture Production Means Co., Ltd is a leading manufacturer of Granular Ammonium Sulphate, Crystalline Ammonium Sulphate, Ammonium Bicarbonate, Boron Magnesium fertilizer, Crude Benzene, Coal Tar, Etc. The head office locates in Tangshan city of Hebei province and the international department locates in Tianjin city. We sincerely welcome all our friends to visit our company, and we hope we can build long term business relationship with you all.