Construction engineering construction (excluding nuclear power station construction and operation, civil airport construction). General items: door and window manufacturing and processing; manufacturing of metal products for safety and fire protection; manufacturing of metal signs for traffic and public management; manufacturing of metal packaging containers and materials; manufacturing of non-road leisure vehicles and parts; metal product repair; traffic facility maintenance; indoor wooden door and window installation services; metal door and window engineering construction; sales of building decoration materials; sales of lightweight building materials; door and window sales; sales of building metal accessories; sales of metal packaging containers and materials; timber sales; installation services for environmental sanitation public facilities; processing of building timber and timber components; manufacturing of lightweight building materials; wholesale of hardware products; sales of non-road leisure vehicles and parts; sales of traffic and public management signs; sales of environmental protection special equipment; sales of metal structures; metal structure manufacturing; manufacturing of hand carts and animal-drawn vehicles; tram manufacturing; tram sales; moped manufacturing; sales of mopeds, mobility scooters, and parts; professional design services; manufacturing of environmental protection special equipment; loading and unloading; security equipment manufacturing; security equipment sales; sales of domestic waste treatment equipment; manufacturing of domestic waste treatment equipment; sales of commercial, catering, and service special equipment; manufacturing of sporting goods and equipment; wholesale of sporting goods and equipment; sales of digital cultural and creative technology equipment; digital creative product exhibition and display services; sales of household appliances; sales of electronic products; landscaping engineering construction; sales of plastic products; retail of hardware products; sales of metal products; sales of metal chains and other metal products; technical services, technical development, technical consulting, technical exchange, technical transfer, and technical promotion; furniture sales; furniture manufacturing; furniture installation and repair services.