The business scope includes general projects: Technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; Sales of mechanical equipment; Installation services for ordinary mechanical equipment; Maintenance of electronic and mechanical equipment (excluding special equipment); Sales of gas compression machinery; Sales of refrigeration and air conditioning equipment; Retail of computer software, hardware, and auxiliary equipment; Sales of instruments and meters; Sales of communication equipment; Sales of construction machinery; Sales of building materials; Wholesale of finished oil products (excluding hazardous chemicals); Sales of electrical equipment; Retail of hardware products; Sales of fire-fighting equipment; Sales of Class I medical devices; Sales of specialized chemical products (excluding hazardous chemicals); Sales of rubber products; Mechanical equipment leasing; Special equipment sales; Internet data service; Contract energy management; Industrial engineering design services; Engineering management services (except for projects that require approval according to law, business activities can be conducted independently based on the business license in accordance with the law)