Research and development of new material technology; Sales of daily necessities; Sales of paper products; Sales of metal products; Wholesale of hardware products; Sales of metal materials; Sales of non-ferrous metal alloys; Sales of high-performance non-ferrous metals and alloy materials; Sales of plastic products; Sales of mechanical equipment; Operation of wires and cables; Sales of packaging materials and products; Sales of doors and windows; Sales of non-metallic minerals and products; Sales of special ceramic products; Sales of new ceramic materials; Sales of architectural ceramic products; Manufacturing of special ceramic products; Manufacturing and processing of architectural ceramic products; Sales of sanitary ceramic products; Sales of daily ceramic products; Sales of building materials; Manufacturing of specialized instruments and meters for environmental monitoring; Sales of specialized instruments and meters for environmental monitoring; Sales of specialized equipment for environmental protection; Manufacturing of specialized equipment for environmental protection; Mechanical equipment research and development; Sales of metal based composite materials and ceramic based composite materials; Sales of soft magnetic composite materials; Sales of high-performance fibers and composite materials; ; Sales of high-performance sealing materials; Sales of seals; Promotion services for new material technology; Sales of new metal functional materials; Domestic trade agency; Domestic freight forwarding agent; Import and export of goods; Technology import and export; Import and export agency.