Manufacturing of special equipment; survey of construction engineering; design of construction engineering; supervision of construction engineering; construction of construction engineering; professional construction operations; construction labor subcontracting; design of building intelligent systems; design of special equipment; installation, renovation, and repair of special equipment; electrical installation services; installation, maintenance, and testing of power transmission, supply, and reception facilities; operation of Class III medical devices; first-class value-added telecommunications services; second-class value-added telecommunications services; internet information services; road cargo transportation (excluding dangerous goods). General projects: manufacturing of refrigeration and air conditioning equipment; manufacturing of mechanical and electrical equipment; manufacturing of metal structures; manufacturing of general equipment (excluding special equipment); development of artificial intelligence application software; integrated circuit design; professional design services; engineering and technical research and experimental development; system integration services; information technology consulting services; information consulting services (excluding licensed information consulting services); engineering management services; fire protection technical services; promotion of new material technology services; contract energy management; energy-saving management services; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; enterprise management; property management; repair of general equipment; professional cleaning, disinfection, and sterilization services; sales of special equipment; sales of refrigeration and air conditioning equipment; sales of building materials; sales of building decoration materials; internet sales (excluding products that require sales licenses); sales of metal structures; sales of mechanical and electrical equipment; sales of Class I medical devices; sales of Class II medical devices; import and export agency; housing leasing; non-residential real estate leasing; road cargo transportation of general goods with a total mass of 4.5 tons and below (excluding network freight and dangerous goods); loading and unloading; earthwork construction; indoor air pollution control; atmospheric environmental pollution prevention services.