Technology development and sales of welding, cutting equipment, automation equipment related accessories, semi-finished products, auxiliary materials, welding and cutting, hardware tools, mechanical and electrical products, instrumentation, lighting products, ceramic products, wire products, sales of communication equipment, kitchen supplies, hygiene products (including personal care products), daily groceries, cosmetics, contraceptives, toys, sporting goods, culture Supplies, clothing and shoes, watches, glasses, needlework and textiles, household appliances, furniture (not engaged in physical store operations), photographic equipment, handicrafts, computers, software and auxiliary equipment, jewelry, edible agricultural products, pet food, electronic products, motorcycles, electric vehicles, bicycles and parts, smart cards, Wujiaodian, domestic trade; import and export of goods and technology. (Except projects that are prohibited by laws, administrative regulations or decisions of the State Council and require approval before registration); sales of metal cutting and welding equipment; research and development of mechanical equipment; research and development of hardware products. Nonresidential real estate rentals. Manufacturing of metal cutting and welding equipment; manufacturing of electronic components and electromechanical component equipment; manufacturing of industrial automatic control system devices; manufacturing and processing of welding, cutting equipment, and automation equipment; sales of Class II medical devices.