Ship modification; Manufacturing of navigation aids and related devices; Manufacturing of urban rail transit equipment; Manufacturing of railway locomotive and rolling stock parts; Manufacturing of high-speed rail equipment and parts; Manufacturing of underwater systems and operation equipment; Manufacturing of diving and salvage equipment; Manufacturing of non-metallic ships; Manufacturing of metal ships; Enterprise management consulting; Technical services, technology development, technical consultation, technical exchange, technology transfer, technology promotion; Information technology consulting services; Information consulting services (excluding licensed information consulting services); Consulting and planning services; Manufacturing of gas compression machinery; Repair of instruments and meters; Ship repair; Repair of general equipment; Repair of special equipment; Repair of electrical equipment; Installation services for general mechanical equipment; Manufacturing of pumps and vacuum equipment; Manufacturing of ship automation, detection and monitoring systems; Sales of water transport equipment parts; Manufacturing of civil aircraft parts; Manufacturing of railway transport infrastructure equipment