Zhongse International Trading Co., Ltd. is mainly engaged in business.

China Color International Trading Co., Ltd. is mainly engaged in various trade fields of non-ferrous metal products. It is the sales agent of many mines and smelting enterprises at home and abroad, focusing on the development of superior varieties such as copper, aluminum, zinc, lead and silver. Expand the coverage of marketing service network through joint ventures and cooperation, strengthen the supporting role of trade services, and continuously improve the ability to provide comprehensive supporting services for overseas development enterprises of the Group.