Retail of computer hardware and software and auxiliary equipment; sales of mobile terminal equipment; sales of audio equipment; retail of photographic equipment and telescopes; sales of cameras and equipment; Sales of surveying and mapping, meteorological and marine special instruments; network technology services; technical services, technology development, technical consultation, technology exchanges, technology transfers, technology promotion; sales of electronic products; sales of intelligent power transmission and distribution and control equipment; sales of communication equipment; domestic trade Agency; manufacturing of computer hardware and software and peripheral equipment; manufacturing of mobile terminal equipment; manufacturing of cameras and equipment; manufacturing of special instruments for navigation, surveying and mapping, meteorology and oceanography; manufacturing of audio equipment; manufacturing of communication equipment.