Manufacturing of mechanical and electrical equipment; Sales of mechanical and electrical equipment; Manufacturing of specialized equipment for food, alcohol, beverage, and tea production; Specialized equipment manufacturing (excluding licensed specialized equipment manufacturing); Manufacturing of specialized equipment for agricultural and sideline food processing; Sales of specialized equipment for agricultural and sideline food processing; Agricultural machinery manufacturing; Sales of agricultural machinery; General equipment manufacturing (excluding special equipment manufacturing); Manufacturing of specialized equipment for environmental protection; Sales of specialized equipment for environmental protection; Manufacturing of specialized packaging equipment; Sales of specialized packaging equipment; Livestock machinery manufacturing; Sales of livestock machinery; Manufacturing of specialized equipment for commercial, catering, and service purposes; Sales of specialized equipment for commercial, catering, and service purposes; Mechanical parts and component processing; Sales of mechanical parts and components; Sales of metal structures; Retail of hardware products; Wholesale of hardware products; Sales of building materials; Sales of lightweight building materials; Sales of building decoration materials; Sales of building waterproofing membrane products; Sales of daily necessities; Sales of office supplies; Sales of household appliances; Furniture sales; Electronic product sales; Labor services (excluding labor dispatch); Import and export of goods; Technology import and export. (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law)