General project: New material technology promotion services; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Wind power generation technology services; Sales of metal products; Metal product repair; Sales of daily necessities; Retail of hardware products; Sales of mechanical equipment; Mechanical equipment leasing; Sales of building materials (excluding sand and gravel materials); Sales of daily necessities; Operation of wires and cables; Sales of power facilities and equipment; Sales of power electronic components; Sales of instruments and meters; Sales of electronic products; Sales of office equipment consumables; Sales of labor protection equipment; Sales of metal structures; Sales of coatings (excluding hazardous chemicals); Import and export of goods; Technology import and export; International freight forwarding agent; Domestic freight forwarding agent; Sales of construction machinery; Engineering and technical services (excluding planning management, survey, design, and supervision); Sales of mechanical and electrical equipment; Sales of new energy driven equipment; Maintenance of electronic and mechanical equipment (excluding special equipment); Sales of valves and cocks; General equipment repair; Engineering management services; Sales of pipeline transportation equipment; Rental of construction machinery and equipment. (Except for projects that require approval according to law, business activities shall be conducted independently based on the business license in accordance with the law)