Guo Ping Huang

HPTec GmbH engages in the design and manufacture of drills, cutters, routers, and drill bits of solid carbide for the printed circuit board industry. Its products include aluminum, plastics, copper, dental and ceramics, and graphite. It also offers regrinding of drills, ring setting, and tool management. The company was founded in 1977 and is headquartered in Ravensburg, Germany.

Hunan Nonferrous Metals Co. Ltd. is an investment holding company, which engages in the mining, processing and sale of nonferrous metals. The company operates through three segments: Nonferrous Metal Mine Site, Nonferrous Metal Smelting, and Cemented Carbides, Tungsen, Molybdenum, Tantalum, Niobium and their Compounds. The Nonferrous Metal Mine Site segment involves mining and trading of nonferrous metals. The Nonferrous Metal Smelting segment includes smelting and trading of nonferrous metals. The Cemented Carbides, Tungsten, Molybdenum, Tantalum, Niobium and their Compounds segment encompasses the manufacture and trading of hard alloys and refractory metal compounds. The company was founded on September 1, 2005 and is headquartered in Changsha, China.

Hunan Nonferrous Metals Holding Group Co., Ltd. engages in the mining, processing, and distributing of lead, zinc, and other . nonferrous metals. Its business scope includes investment in non-ferrous metal mines and other industrial investments with own assets; production and sales of non-ferrous metal products and related technical services; and processing and sales of gold and silver products and related technical services. The company was founded on August 20, 2004 and is headquartered in Changsha, China.

China Minmetals Nonferrous Metals Co., Ltd. supplies non-ferrous metals resources. It explores for metals & minerals, including copper, aluminum, tungsten, tin, antimony, lead, zinc and nickel as well as electrical products. The company was founded on December 27, 2001 and is headquartered in Beijing, China.