The business scope of the company includes hotels (limited to Yanjiao Base Branch of China Shipping Industry Co., Ltd., valid until May 3, 2025); Catering service; Ordinary freight; Sales of chemical products; Centralized aged care service; Property management; Conference services; Technical development, technical consultation and technical services; Labor service; Rental and maintenance of houses; Installation and construction of wired communication equipment; System debugging, maintenance and overhaul; Computer network design, installation and maintenance; Design, development and maintenance of information system; Science and technology archives management; Weak current engineering design, construction and installation; Processing of petroleum exploration equipment and accessories; Cleaning of central air conditioning piping system; Cleaning of sewage system; Restaurant flue cleaning; Rent a car; Information consulting service; Professional cleaning, disinfection and testing services for ships; Sales of building materials, instrumentation, auto parts, household appliances, daily necessities, mechanical equipment, electrical equipment, computers, software and auxiliary equipment; Real estate information consultation; Professional design services; Hotel management; Sports project management (except high-risk sports); Engineering management service.