Security system monitoring services; Internet data services; Information system integration services; Traffic facility maintenance; Computer and office equipment repair; Special-purpose packaging equipment manufacturing; General equipment repair; Information technology consulting services; Intelligent building engineering construction; Data processing and storage support services; Professional repair of communication transmission equipment; Security equipment sales; Various types of construction activities; Retail of computer hardware and software and auxiliary equipment; Sales of chemical products (excluding chemical products requiring permits); Sales of doors and windows; Retail of sports goods and equipment; Retail of clothing and accessories; Retail of hardware and metal products; Sales of communication equipment; Repair of communication equipment; Sales of electronic products (Operable only if permitted by relevant departmental approval, in accordance with the provisions of the Company Law).