sales of machinery and equipment; Machinery and equipment leasing; R&D of machinery and equipment; sales of power electronic components; sales of electronic special equipment; Wholesale of hardware products; hardware product retail; wholesale of auto parts; auto parts retail; electronic product sales; sales of metal materials; sales of plastic products; Electronic components and electromechanical components equipment manufacturing; Industrial automatic control system device manufacturing; Industrial automatic control system device sales; sales of electronic components and electromechanical components; Processing of mechanical parts and parts; sales of mechanical parts and parts; General parts manufacturing; Domestic trade agent; industrial design services; Hardware product research and development; Trade agent. Import and export of goods (except for projects that must be approved according to law, independently carry out business activities according to law on the basis of business license) import and export of goods; technology import and export; Import and export agent.