General projects: Machining of mechanical parts and components; Sales of mechanical parts and components; Wholesale of hardware products; Research and development of hardware products; Wholesale of electronic components; Sales of metal products; Sales of electrical equipment; Sales of building decoration materials; Fastener manufacturing; General equipment manufacturing (excluding special equipment manufacturing); Manufacturing of other specialized instruments; Manufacturing of non-ferrous metal alloys; Sales of hydraulic power machinery and components; Manufacturing of mechanical and electrical equipment; Sales of mechanical equipment; Installation services for ordinary mechanical equipment; Information system integration services. (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law)