Licensed project: Import and export of goods; Internet information service; Technology import and export. General project: Sales of metal cutting and welding equipment; Sales of metal products; Wholesale of hardware products; Retail of hardware products; Sales of metal tools; Repair of metal wire ropes and metal products; Repair of daily products; Mechanical parts: Sales of their products; Sales of components; Research and development of hardware products; Mechanical equipment research and development; Sales of mechanical equipment; Sales of electrical and mechanical equipment; Research and development of metal products; Software development: Sales of household appliances; Electronic product sales; Sales of communication equipment; Sales of building materials; Retail of kitchenware, sanitary ware, and daily necessities; Sales of kitchenware, sanitary ware, and daily necessities; Software sales; Zero order sales of computer software, hardware, and auxiliary equipment; Wholesale of computer software, hardware, and auxiliary equipment; Installation services for ordinary mechanical equipment; Maintenance of electronic and mechanical equipment (excluding special equipment); Internet sales (except for the sale of goods that need to be licensed);