Scope of Business General items: Construction engineering machinery sales; Construction engineering machinery manufacturing; Construction engineering machinery and equipment leasing; Mechanical equipment R & D; Hardware products retail: Goods import and export: Hardware products wholesale: Special equipment repair; Technical services, technical development, technical consultation, technical exchange, technology transfer, technology promotion; Sales of metal materials: Sales of refractory materials, sales of building materials; Sales of network equipment: Sales of office supplies; Sales of household appliances.