Licensed project: Construction project construction (projects that require approval by law can only be carried out after approval by relevant departments, and specific business projects are subject to approval results) General project: Sales of instruments and meters; Wire and cable management; Electronic product sales; Sales of valves and plugs; Sales of mechanical equipment; Sales of chemical products (excluding licensed chemical products); Sales of mechanical and electrical equipment; Sales of industrial automatic control system devices; Sales of intelligent instruments and meters; Instrument and meter repair; Sales of electrical instruments and meters; Retail of hardware products; Import and export of goods (except for projects that require approval according to law, conducting business activities independently based on the business license in accordance with the law)