General project technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; Wholesale of hardware products; Sales of metal products; Sales of metal materials; Sales of metal chains and other metal products; Sales of non-ferrous metal alloys; Sales of high-quality special steel materials; Special equipment sales; Sales of high-performance non-ferrous metals and alloy materials; Sales of valves and cocks; Sales of forgings and powder metallurgy products; Fastener sales; Sales of metal structures; Sales of industrial control computers and systems; Industrial design services; Valve and plug development; Hardware product research and development; Import and export of goods; Technology import and export (except for projects that require approval according to law, business activities can be conducted independently based on the business license in accordance with the law)