General project: Sales of metal products; Research and development of metal products; Manufacturing of metal materials; Sales of mechanical equipment; Sales of high-quality special steel materials; Sales of special equipment; Sales of metal structures; Sales of metal fittings for construction; Sales of steel reinforcement products for construction; Sales of metal chains and other metal products; Sales of lightweight building materials; Sales of metal wire ropes and their products; Sales of building decoration materials; Sales of building materials; Sales of building blocks; Sales of non-metallic minerals and products; Sales of labor protection equipment; Sales of communication equipment; Sales of non-ferrous metal alloys; Operation of wires and cables; Sales of electrical equipment; Wholesale of hardware products; Sales of office equipment; Steel rolling processing; Retail of computer software, hardware, and auxiliary equipment; Manufacturing of hardware products; Import and export of goods; Technology import and export; Research and development of new material technology; Bearing sales; Sales of plastic products; Electronic product sales. (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law)