Mai Huong Thi Do

Vietnam National Coal & Mineral Industries Holding Corp. Ltd. engages in exploring, investing, exploiting, processing, and selling of coal and minerals products. Its other activities include production and sale of industrial explosive materials and ammonium nitrate; investment, construction, and manufacture of electricity, and other activities related to main businesses. The company was founded on October 10, 1994 and is headquartered in Ha Noi, Vietnam.

Cao Bang Mineral & Metallurgical JSC engages in the mineral mining. Its activities include include geological survey; mineral exploiting, collection, processing, and exporting; and trading of equipment and instruments related to mineral mining. the company was founded in 1950 and is headquartered in Cao Bang, Vietnam.