Hai Ngoc Do

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.

Thai Nguyen Non-Ferrous Metal JS engages in precious metal ore mining. Its activities include mining and processing of ferrous and precious metals, iron ore, non-ferrous ore, and non-ferrous metal; chemical mining and mineral fertilizer products; and production of iron, steel, and cast iron. The company was founded on May 10, 2005 and is headquartered in Thai Nguyen, Vietnam.

Minerals Joint Stock Company N03 - VIMICO engages in exploration, exploitation, processing and trading of minerals. Its other activities include project planning, investment consulting, construction of geological works, mining, mineral refining and processing works, construction of civil, industrial, traffic, irrigation, installation residential electricity, and industrial electricity. The company was founded on August 4, 1992 and is headquartered in Lao Cai, Vietnam.