Yunnan Tin Company Limited, along with its subsidiaries, explores, mines, beneficiates, and smelts metal ores including tin, indium, zinc, copper, and other non-ferrous metals in China and internationally. Its products include high-purity tin, tin ingots, solder ingots, high-purity indium ingots, cathode copper, zinc ingots and zinc alloys for die casting, and precious metals such as silver and gold. The company also offers 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, tin-plated sheets, organic and inorganic tin chemicals, and silver ingots, sold under the YT brand. Additionally, it engages in commerce, investment and trade, metal smelting, nonferrous metal mining, and finance lease activities. Founded in 1883, the company is based in Kunming, China.