Yunnan Tin. 

Yunnan Tin Company Limited, together with its subsidiaries, engages in the exploration, mining, beneficiation, and smelting of metal ores, such as tin, indium, zinc, copper, and other non-ferrous metals in China and internationally. The company offers high-purity tin, tin ingots, and solder ingots; high-purity indium ingots; cathode copper; zinc ingots and zinc alloys for die casting; and precious metal products, including silver and gold. It also provides lead-free tin solders, tin anodes, solder bars and wires, tin-based spherical solder powders, tin alloys, solder pastes, BGA solders, preformed solder media, tin granules, tin bars, and tin-plated sheets; organic and inorganic tin chemicals; and silver ingots. The company sells its products under the YT brand. In addition, it is involved in commerce; investment and trade; metal smelting; nonferrous metal mining; and finance lease activities. Yunnan Tin Company Limited was founded in 1883 and is based in Kunming, China.