2. Yunnan Energy Investment Group Co., Ltd.: Mainly engaged in energy investment, mineral resources development, hydropower engineering construction and other businesses.
3. Yunnan Copper Co., Ltd.: Mainly engaged in copper resource development, smelting and processing, copper product sales and other businesses.
4. Yunnan Chengtou Holding Group Co., Ltd.: Mainly engaged in urban infrastructure construction, real estate development, environmental protection industry and other businesses.