Construction engineering design; Construction engineering construction; Construction engineering construction (excluding nuclear power station construction and operation, civil airport construction); Road motor vehicle production; Urban domestic waste operational services; Urban construction waste disposal (clearance and transportation); River dredging construction specialized operations; Road freight transport (excluding dangerous goods); Highway management and maintenance; Kitchen waste treatment. General projects: Environmental protection consulting services; Environmental protection special equipment sales; Engineering and technological research and experimental development; Environmental protection special equipment manufacturing; Professional design services; General mechanical equipment installation services; Metal structure manufacturing; Engineering technical services (including planning management, survey, design, and supervision); Technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; Mechanical parts and components processing; Mechanical parts and components sales; Auto parts remanufacturing; Auto parts and accessories manufacturing; Construction machinery and equipment leasing; Electrical machinery special equipment manufacturing; Technology import and export; Import and export of goods; Landscaping engineering construction; Professional cleaning, disinfection, and sterilization services; Water pollution control; Pipeline transportation equipment sales; Building cleaning services; Environmental sanitation public facility installation services; Housekeeping services; Property management; Container manufacturing; Container sales; Container maintenance; Radar and supporting equipment manufacturing; Special instrument manufacturing; Instrument and meter sales; Environmental emergency technical equipment manufacturing; Environmental emergency technical equipment sales; Auto parts retail; Urban and rural appearance management; Municipal facility management; Urban greening management; Flood control and drainage facility management; Urban park management; Scenic area management; Environmental emergency treatment services; Sewage treatment and its reuse; Auto parts research and development; Industrial engineering design services; Mechanical and electrical equipment sales; Domestic waste treatment equipment sales; Mechanical and electrical equipment manufacturing; Power transmission and distribution control equipment manufacturing; Domestic waste treatment equipment manufacturing; Intelligent unmanned aerial vehicle manufacturing; Intelligent unmanned aerial vehicle sales; Testing machine manufacturing; Testing machine sales; Artificial intelligence public data platform; Artificial intelligence industry application system integration services; Intelligent robot research and development; Intelligent robot sales; Special operation robot manufacturing; Artificial intelligence hardware sales; Emergency rescue services; Diving rescue equipment manufacturing; Security equipment manufacturing; Safety and fire-fighting metal product manufacturing; Security equipment sales; Fire-fighting equipment sales.