Yunnan Copper Company Limited (SZSE: 000878, formerly Yunnan Smelting Plant)[1][2] is the third largest copper producer in China.

[3] In November 2007, Aluminum Corporation of China Limited acquired 49% of total shares of Yunnan Copper Group, Yunnan Copper Company's parent company.

[4] As of 2017, Yunnan Copper Die Casting, a joint venture between the company and Nanyang Explosion Protection Group Co.,[5] is a known electric motor manufacturer.

[5] The International Copper Association, in collaboration with Yunnan Copper Die Casting, launched a program in 2013 to remanufacture old electric motors by replacing their aluminum rotors with cast copper rotors.

This process significantly improves motor efficiency, allowing older models to meet modern energy efficiency standards.