Manufacturing of metal signs for traffic and public management; Import and export of goods; Food import and export; Sales of metal products; Sales of special equipment for plastic processing; Sales of special equipment for semiconductor devices; Optical fiber sales; Assisting the sales of bicycles, scooters and spare parts; Sales of special equipment for environmental protection; Sales of communication equipment; Manufacturing of glass fiber reinforced plastic products; Sales of glass fiber reinforced plastic products; Professional cleaning, cleaning and disinfection services; Security equipment manufacturing; Service consumption robot sales; General equipment manufacturing (excluding special equipment manufacturing); Service consumption robot manufacturing; Intelligent home consumption equipment manufacturing; Sales of audio equipment; Audio equipment manufacturing; Manufacturing of electronic components; Manufacturing of communication equipment; Metal material manufacturing; Sales of high-quality special steel materials; R&D of new material technology; Furniture manufacturing; Manufacturing of lighting fixtures; Sales of lighting appliances; Digital video monitoring system sales; Manufacturing of display devices; Manufacturing of electronic measuring instruments; Sales of electronic measuring instruments; Manufacturing of special equipment for semiconductor devices; Sales of metal tools; Sales of new cars; Manufacturing of metal daily necessities; Sign sales for traffic and public management; Sales of arts and crafts products and etiquette supplies (excluding ivory and its products); Metal structure sales; Metal structure manufacturing; Paint manufacturing (excluding hazardous chemicals); Manufacturing of power facilities and equipment; Sales of mechanical and electrical equipment; Hardware products manufacturing; Manufacturing of mechanical and electrical equipment; Sales of metal wire rope and its products; Furniture sales. (Except for projects that need to be approved according to law, they can independently carry out business activities according to law with their business licenses) Permitted projects: Electrical installation services; Construction works; Electronic publication production; Retail of publications.