Welcome to YSM--Focused on brucite based products YSM(Dandong Yung Sing Mining Company Ltd.) is a privately owned company since 1999. YSM is specialized in manufacturing and exporting of magnesium oxide and magnesium hydroxide products. 　 YSM owns two brucite mines with the reserve of over 800, 000 tons together. Our Mission: YSM is committed to maximizing customer satisfaction through the stable and timely delivery of quality products at competitive prices.