General project: Promotion services for new material technology; Sales of metal products; Sales of metal materials; Sales of chemical products (excluding licensed chemical products); Sales of specialized chemical products (excluding hazardous chemicals); Sales of surface functional materials; Sales of new catalytic materials and additives; Sales of new membrane materials; Dye sales; Sales of ecological environment materials; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Sales of metal chains and other metal products; Wholesale of hardware products; Wholesale of kitchenware, sanitary ware, and daily necessities; Retail of kitchenware, sanitary ware, and daily necessities; Sales of refrigeration and air conditioning equipment; Retail of hardware products. (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law)