General project: Manufacturing of metal wire ropes and their products; Sales of metal wire ropes and their products; Manufacturing of metal materials; Sales of metal materials; Sales of glass fiber and products: Sales of metal products; Rubber product manufacturing; Sales of rubber products, manufacturing of metal accessories for construction; Sales of metal accessories for construction and manufacturing of metal structures; Sales of metal structures, manufacturing of concrete structural components, and sales of concrete structural components; Steel rolling processing, installation services for ordinary mechanical equipment, and rental of mechanical equipment; Rental services (excluding licensed rental services): Rental of construction machinery and equipment. (Except for projects that require approval according to law, conduct business activities independently based on the business license) Licensed project: Electrical installation services; Construction project construction. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments. The specific business projects shall be subject to the approval documents or licenses issued by the relevant departments. )