Electronic automation engineering installation services; Integrated circuit design; Computer network system engineering services; Broadcasting system engineering services; Software wholesale; Electronic equipment engineering installation services; Installation of protective equipment for civil air defense engineering; Special equipment installation (excluding elevators and boilers); Computer wholesale; Wholesale of computer spare parts; Wholesale of office equipment consumables; Wholesale of communication equipment and supporting equipment; Wholesale of communication terminal equipment; Wholesale of broadcasting equipment and its accessories; Security monitoring and anti-theft alarm system engineering services; Intelligent installation engineering services; Building equipment automation system engineering services; Smart card system engineering services; Communication system engineering services; Design, construction, and maintenance of safety technology prevention systems; Wholesale of electronic products; Wholesale of safety technology prevention products; Sales of specialized equipment; Software development; Information system integration services; Computer room maintenance services; Information technology consulting services; Data processing and storage services; Installation services for monitoring system engineering; Civil drone system repair (except for projects prohibited by laws, administrative regulations, and decisions of the State Council, which must be licensed before operation); Sales of drones; Technical development and application of drone software and hardware; Technical services for unmanned aerial vehicle systems; Computer retail; Retail of computer spare parts; Software retail; Retail of office equipment consumables; Retail of communication equipment; Retail of security technology prevention products; Retail sales of vending machines, ticket machines, teller machines, and spare parts; Retail of typewriters, copiers, and word processors; Retail of electrical equipment; Retail of general mechanical equipment; Sales of Radio Frequency Identification (RFID) equipment; Sales of flight simulation training related software for aviation simulators; Uninterruptible power supply sales; Sales of lightning protection equipment; Wholesale of agricultural machinery; Wholesale of mechanical accessories; Sales of water-saving irrigation equipment; Retail of measuring instruments; Retail of mechanical accessories; Wholesale of metal products; Sales of general mechanical equipment; Wholesale of instruments and meters; Sales of 3D scanning and printing equipment; Wholesale trade of goods (excluding licensed and approved goods); Internet product sales (excluding licensed and approved products)