Manufacture of refrigeration and air conditioning equipment; manufacture of high-speed rail equipment and parts; manufacture of spray guns and similar appliances; processing of mechanical parts and components; manufacture of general parts; manufacture of fans and blowers; manufacture of gas compression machinery; manufacture of railway rolling stock parts; manufacture of urban rail transit equipment; manufacture of marine supporting equipment; manufacture of offshore engineering platform equipment; manufacture of domestic waste treatment equipment; manufacture of flooring; manufacture of glass fiber and products; manufacture of containers; manufacture of environmental emergency technical equipment; sale of railway rolling stock parts; sale of electrical equipment; sale of fans and blowers; sale of offshore engineering equipment; sale of glass fiber and products; sale of rail transit green composite materials; information consulting services (excluding licensed information consulting services); industrial design services; engineering technical services (excluding planning management, survey, design, and supervision); technical services, technology development, technical consultation, technical exchange, technology transfer, and technology promotion; research and development of mechanical equipment; manufacture of servo control mechanisms; manufacture of industrial automatic control system devices; repair of electrical equipment; repair of general equipment; repair of specialized equipment; manufacture of electrical signal equipment devices; manufacture of electronic measuring instruments; manufacture of railway special measuring or testing instruments; software development; sale of electronic products; sale of lubricating oil; sale of industrial automatic control system devices; maintenance of electronic and mechanical equipment (excluding special equipment); sewage treatment and its reuse; non-residential real estate leasing; housing leasing; land use rights leasing; mechanical equipment leasing; storage equipment leasing services; transportation equipment leasing services; office equipment leasing services; property management; parking lot services; goods import and export; technology import and export.