Sales of electrical and mechanical equipment; Retail of computer hardware, software and auxiliary equipment; Industrial automatic control system device sales; Sales of electronic components and electromechanical components; Sales of pneumatic power machinery and components; Hydraulic power machinery and components sales; Internet equipment sales; Sales of power electronic components; Sales of bearings, gears and transmission components; Gear and gear reduction, transmission sales; Hardware products wholesale; Sales of labor protection products; Computer and office equipment maintenance; Electrical equipment repair; Technical service, technical consultation and technology transfer; Information consulting services (excluding licensed information consulting services); Supply chain management services. (Except for projects subject to approval according to law, independently carry out business activities according to law with business licenses)