R&D, sales: communication products, computer systems and terminal hardware, software; Sales: electronic instruments, electronic components, electronic products, power supplies, integrated circuits, computers and their accessories, instruments and meters; Own equipment leasing, security equipment leasing, mechanical and electrical equipment leasing, instrument and equipment leasing; Provide technical consultation, technical service and technology transfer in related fields. (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments) Permitted projects: construction engineering construction (for projects subject to approval according to law, business activities can only be carried out after approval by relevant departments, the specific business projects shall be subject to the approval results) General projects: technology import and export; Import and export of goods; Import and export agent; Machinery and equipment leasing (except for items subject to approval according to law, independently carry out business activities according to law with business license)