General project: Hardware product research and development; Fastener manufacturing; Fastener sales; Manufacturing of metal products: Retail of hardware products; Manufacturing of metal materials; Sales of metal materials; General component manufacturing technology: Consultation, technical manufacturing; Sales of mechanical parts and components; Technical services, technology development, technology exchange, technology transfer, technology promotion: Import and export of goods: Import and export of technology (Except for projects that require approval according to law, business activities shall be conducted independently based on the business license in accordance with the law)