Tianjin ruister international co., ltd. is located in tianjin city. we enjoy good geographic location and convenient transportation access. as a specialized manufacturer of sodium sulphide and anhydrous sodium sulphate in china, we set up our factories in shanxi and mongolia provinces. presently, we have established close cooperative relationships with our customers. our products have been well-received and highly appraised by our customers in over 30 countries and regions in europe, oceania, africa, asia and america. after years' hard work, ruister now has become a trade company specializing in the import and export of all kinds of chemicals, light industrial products and minerals