Manufacturing of specialized equipment for food, alcohol, beverage, and tea production; Specialized equipment manufacturing (excluding licensed specialized equipment manufacturing); Sales of specialized equipment for agricultural and sideline food processing; Sales of mechanical equipment; General equipment manufacturing (excluding special equipment manufacturing); Manufacturing of metal processing machinery; Manufacturing of specialized equipment for commercial, catering, and service purposes; Sales of mechanical parts and components; Manufacturing of specialized equipment for agricultural and sideline food processing; Mechanical equipment research and development; Sales of specialized equipment for commercial, catering, and service purposes; Mechanical parts and component processing; Installation services for ordinary mechanical equipment; 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)