Technical services, technology development, technology consultation, technology exchange, technology transfer, technology promotion; hardware product research and development; auto parts research and development; motorcycle and parts research and development; software development; general parts manufacturing; fastener manufacturing; fastener sales; auto parts retail; rail transit special equipment, key systems and parts sales; motorcycles and spare parts retail; mechanical parts, spare parts sales; metal tool sales; metal product sales; metal material sales; hardware product wholesale; auto parts wholesale; motorcycle and spare parts wholesale; general Cargo warehousing services (excluding hazardous chemicals and other items requiring license approval); general mechanical equipment installation services; information consulting services (excluding licensing information consulting services); supply chain management services; loading and unloading; domestic trade agents; domestic cargo transportation agents; advertising design, agents; advertising releases (non-radio stations, TV stations, newspapers and periodical publishing units); electrical equipment repair; special equipment repair; computer and office equipment repair; general equipment repair; electronic and mechanical equipment maintenance (excluding special equipment); special equipment rental; professional maintenance Cleaning, cleaning and disinfection services; leasing of non-residential real estate; Internet sales (except for the sale of goods requiring licenses); sales of construction materials; sales of metal structures; sales of metal accessories for construction; sales of wires and cables; sales of communication equipment; sales of electrical equipment; sales of Class I medical devices; sales of Class II medical devices; sales agents; sales of bearings, gears and transmission parts; sales of chemical products (excluding licensed chemical products); sales of office supplies; sales of new cars; sales of household appliances; sales of electrical instruments; sales of intelligent instruments Sales of food additives; sales of lubricants; sales of agricultural and sideline products; sales of daily necessities; retail of cosmetics; sales of special equipment; sales of network equipment; sales of fire-fighting equipment; sales of mechanical equipment; sales of textiles; sales of daily glass products; sales of power electronic components; wholesale of electronic components; sales of electronic components and electromechanical components; sales of lighting equipment; wholesale of refined oil (excluding hazardous chemicals); conference and exhibition services; road cargo transportation station operations; packaging services; sales of labor protection supplies; household appliance installation services. Licensed items: road cargo transportation (excluding dangerous goods); import and export of goods; technology import and export; various engineering construction activities; third-category medical device operations; food sales; second-category value-added telecommunications business; retail of refined oil (excluding hazardous chemicals); import and export agents; electrical installation services.