Tangshan Yutong Import & Export Corporationis located in the famous industrial city - Tangshan, surrounded by Beijing-Tianjin-Tangshan triangle economic zone. It ' an incorporated company mainly exporting Calcium series and Magnesium series chemical products, as well as refractory materials. Our products include: Calcium Carbonate, Calcium Hydrate, Calcium Oxide, Calcium Lignosulphonate, Calcium Aluminate, Calcium Boride; Magnesium Sulphate, Magnesium Carbonate,Magnesium Oxide; Chromium Oxide Green series; Monosodium Glutamate, Instant Dissolving Sodium silicate, etc.