General items: import and export of goods; Sales of metal materials; Sales of new metal functional materials; Sales of high-performance non-ferrous metals and alloy materials; Sales of non-ferrous metal alloys; Sales of high-quality special steel materials; Metal cutting and processing services; Manufacturing of refrigeration and air conditioning equipment; Sales of refrigeration and air conditioning equipment; Manufacturing of metal daily necessities; Manufacturing of mechanical and electrical equipment; Sales of mechanical and electrical equipment; Research and development of kitchenware, sanitary ware, and daily necessities; Wholesale of kitchen utensils, sanitary ware, and daily necessities; Retail of kitchen utensils, sanitary ware, and daily necessities; Research and development of household appliances; Sales of household appliances; Retail of household appliances; Home appliance installation services; Sales of electric heating food processing equipment; Manufacturing of specialized equipment for commercial, catering, and service purposes; Sales of specialized equipment for commercial, catering, and service purposes; Special equipment manufacturing (excluding licensed professional equipment manufacturing); General equipment manufacturing (excluding special equipment manufacturing); Manufacturing of specialized equipment for food, alcohol, beverage, and tea production; Manufacturing of specialized equipment for environmental protection; Sales of specialized environmental protection equipment; Manufacturing of fans and fans; Sales of fans and fans; Rental of mechanical equipment; Sales of mechanical equipment; Wholesale of clothing and clothing; Retail of clothing and apparel; Sales of labor protection equipment; Sales of daily necessities; Sales of special labor protection equipment. (Except for projects that require approval in accordance with the law, business activities can be carried out independently with the business license in accordance with the law) Licensed project: production of electric heating food processing equipment. (For projects that require approval according to law, business activities can only be carried out with the approval of relevant departments. The specific business projects shall be subject to the approval documents or permits of relevant departments.)