General projects: Technical services, technical development, technical consultation, technical exchange, technology transfer and technology promotion; Sales of valves and cocks; Sales of special equipment; Sales of pumps and vacuum equipment; Sales of mechanical equipment; Wholesale of hardware products; Procurement agency services; Sales of intelligent instruments and meters; Sales of electronic products; Import and export of goods; Technology import and export (except for projects subject to approval according to law, business activities shall be carried out independently according to law with the business license).