Masan High-Tech Materials Corporation is a Vietnamese industrial group and global leader in advanced tungsten materials, with production facilities in Vietnam, Germany, Canada, and China. A subsidiary of Masan Group, the company operates the Nui Phao polymetallic mine in Thai Nguyen province, one of the world's largest tungsten deposits. It is also a globally significant producer of fluorspar and bismuth. Mitsubishi Materials Corporation made a $90 million strategic investment for a 10% stake. The company is building Asia's first large-scale tungsten recycling plant.