Design, research, development, and sales of microwave and radio frequency devices, equipment, and systems; Electronic product assembly, sales, and installation; Sales of instruments, communication equipment, power supplies, electrical appliances, and electronic components; Design, processing, and sales of precision and non-standard components; Sales and installation of mechanical and electrical equipment; Computer software development and technical services; Import and export of goods and technologies (excluding goods and technologies that are restricted, prohibited, and subject to approval by the state). (Projects that require approval according to law can only be operated with the approval of relevant departments)