Highway management and maintenance; civil nuclear safety equipment design; special equipment design; special equipment manufacturing; road motor vehicle production; civil nuclear safety equipment manufacturing; inspection and testing services; road cargo transport (excluding dangerous goods); urban domestic waste operational services; construction professional operations. General items: mechanical equipment research and development; general equipment manufacturing (excluding special equipment manufacturing); special equipment manufacturing (excluding licensed professional equipment manufacturing); mechanical equipment sales; special equipment sales; automobile sales; metal product research and development; metal structure manufacturing; metal product sales; nuclear power equipment complete set and engineering technology research and development; intelligent basic manufacturing equipment manufacturing; intelligent basic manufacturing equipment sales; intelligent control system integration; information system integration services; intelligent material handling equipment sales; intelligent storage equipment sales; artificial intelligence hardware sales; technical services, technology development, technology consulting, technology exchange, technology transfer, technology promotion; non-ferrous metal casting; special equipment repair; general mechanical equipment installation services; station hydrogen refueling and storage facility sales; mechanical parts and components sales; software development; software sales; metal surface treatment and heat treatment processing; metal cutting processing services; non-ferrous metal rolling processing; arts and crafts and ceremonial supplies manufacturing (excluding ivory and its products); arts and crafts and ceremonial supplies sales (excluding ivory and its products); spray coating processing; metrology technical services; rural domestic waste operational services; building cleaning services; water pollution control; mechanical equipment leasing; internet sales (excluding goods requiring sales permits); investment activities with own funds; housing leasing; non-residential real estate leasing; import and export of goods; technology import and export; renewable resource sales.