Research and development of mechanical and electrical equipment; Mechanical equipment and accessories, automation equipment, pneumatic components, hardware products, household appliances, rubber and plastic products, electronic products, communication equipment (excluding satellite TV broadcasting ground receiving facilities and transmitters), computer software and auxiliary Sales of equipment, auto parts, motorcycle parts, textiles and raw materials, clothing, apparel, and daily necessities; Self-operate and agent import and export business of various commodities and technologies (except for commodities and technologies that are restricted by the state or prohibited by the state). (Projects that are subject to approval in accordance with the law can be operated only after approval by relevant departments)