Sales of office supplies; Retail of stationery; Sales of paper products; Leasing of cultural equipment; Sales of metal tools; Sales of metal materials; Sales of rubber products; Sales of new metal functional materials; Sales of non-ferrous metal alloys; Research and development of hardware products; Sales of molds; Sales of mechanical parts and components; Import and export of goods; Import and export of technology; Information technology consulting services; Manufacturing of non-ferrous metal alloys; Casting of non-ferrous metals; Manufacturing of molds; Casting of ferrous metals; Manufacturing of forgings and powder metallurgy products; Sales of forgings and powder metallurgy products; Technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; Manufacturing of casting machinery; Manufacturing of metal processing machinery; Processing of mechanical parts and components; Sales of mechanical equipment; Installation services for general mechanical equipment; Leasing of mechanical equipment; Research and development of mechanical equipment; Maintenance of electronic and mechanical equipment (excluding special equipment); Sales of metal products; Sales of office equipment; Sales of instruments and meters; Wholesale of electronic components; Sales of environmental protection special equipment; Sales of casting machinery; Sales of metallurgical special equipment; Sales of material handling equipment; Leasing services (excluding licensed leasing services); Loading and unloading; Industrial engineering design services; General cargo warehousing services (excluding items requiring permits such as hazardous chemicals); Manufacturing of material handling equipment; Sales of special equipment; Domestic cargo transportation agency; Leasing services for storage equipment; Installation and maintenance of industrial robots; Sales of industrial robots; Operation of road cargo transport stations; Information consulting services (excluding licensed information consulting services); Road cargo transportation of general goods with total mass of 4.5 tons and below (excluding network freight and dangerous goods); Import and export agency; Conference and exhibition services.