General items: Sales of industrial automatic control system devices, sales of mechanical and electrical equipment, sales of office equipment, sales of special equipment for packaging, sales of intelligent power transmission and distribution and control equipment, sales of intelligent robots, engineering and technology research and experimental development, import and export of goods, sales of sewing machinery, sales of mechanical equipment, sales of electrical equipment, sales of metal forming machine tools, sales of valves and cocks, sales of software, research and development of mechanical equipment, sales of bearings, sales of electronic components and electromechanical components, sales of power electronic components, sales of electrical equipment, sales of electrical instruments and meters, repair of instruments and meters, sales of electrical signal equipment and devices, and repair of electrical equipmentSales of capacitors and their supporting equipment; Sales of instruments and meters for supply; Sales of electronic measuring instruments; Sales of calculator equipment; Sales of electronic products; Sales of lighting appliances; Sales of special equipment for the production of lighting appliances; Sales of daily necessities; Sales of special equipment for environmental protection; Retail of sporting goods and equipment; Sales of automobile decoration products; Retail of auto parts; Sales of power distribution switch control equipment; Sales of agricultural and sideline products; Sales of daily miscellaneous products; Retail of daily household appliances; Sales of optical instruments; Retail of hardware products; Construction of landscaping engineering; Construction of earthwork engineering; Construction of metal doors and windows; Enterprise management; Packaging services; Sales of optoelectronic devices. (Except for projects subject to approval in accordance with the law, independently carry out business activities with a business license in accordance with the law) Licensed projects: Residential interior decoration. (For projects subject to approval in accordance with the law, business activities can only be carried out after approval by relevant departments, and specific business projects are subject to the approval documents or licenses of relevant departments)