General Projects: R & D of electronic special materials; sales of advanced power electronic devices; retail of electronic components; sales of optoelectronic devices; sales of electronic special equipment; sales of electronic special materials; sales of electronic vacuum devices; Sales of electronic components and electromechanical components; sales of electronic measuring instruments; sales of power electronic components; sales of electronic products; sales of instruments; sales of metal products; sales of office equipment; Sales of hydraulic and pneumatic components and systems; sales of high-speed precision gear transmission; sales of artificial intelligence hardware; sales of high-speed precision heavy-duty bearings; sales of servo control agencies; sales of intelligent basic manufacturing equipment; Intelligent material handling equipment sales; intelligent port handling equipment sales; intelligent warehousing equipment sales; display device sales; optical equipment sales; optical communications equipment sales; supply and application instrument sales; Retail of auto parts; wholesale of auto parts; domestic trade agent; import and export of goods; import and export of technology; import and export agent (except licensing business, independent operation of non-prohibited or restricted items according to laws and regulations)