General project: Research and development of mechanical equipment; Research and development of new material technology; Technical services, development, consultation, exchange, transfer, and promotion; Manufacturing of specialized equipment for environmental protection; Sales of specialized environmental protection equipment; Agricultural machinery manufacturing; Manufacturing of packaging specialized equipment; Special equipment manufacturing (excluding licensed professional equipment manufacturing); General equipment manufacturing (excluding special equipment manufacturing); Sales of mechanical equipment; Manufacturing of mechanical and electrical equipment; Sales of mechanical and electrical equipment; Manufacturing of general components; Sales of mechanical parts and components; Processing of mechanical parts and components; Special equipment sales; Rental of construction machinery and equipment; Sales of construction machinery; Professional design services; Repair of communication equipment; Installation services for general mechanical equipment; Rental of mechanical equipment; Import and export of goods; Technology import and export; (Except for projects that require approval in accordance with the law, business activities shall be carried out independently with the business license in accordance with the law)