Railway transportation infrastructure equipment manufacturing; Construction engineering design; Railway locomotive vehicle repair. General projects: Tunnel construction special machinery manufacturing; Tunnel construction special machinery sales; Mining machinery manufacturing; Mining machinery sales; Urban rail transit equipment manufacturing; Rail transit special equipment, key systems and parts sales; Rail transit engineering machinery and parts sales; Construction engineering machinery manufacturing; Construction engineering machinery sales; Rail transit green composite material sales; Agricultural machinery manufacturing; Agricultural machinery sales; Agricultural machinery leasing; Agricultural machinery services; Agricultural, forestry, animal husbandry and fishery machinery parts sales; Agricultural, forestry, animal husbandry and fishery professional machinery manufacturing; Agricultural, forestry, animal husbandry, fishery professional machinery sales; Environmental protection special equipment manufacturing; Environmental protection special equipment sales; Mechanical equipment sales; Mechanical parts and components sales; Intelligent robot research and development; Intelligent robot sales; Industrial robot manufacturing; Industrial robot sales; Special operation robot manufacturing; Material handling equipment manufacturing; Material handling equipment sales; Building materials production special machinery manufacturing; Intelligent warehousing equipment sales; Internet of Things equipment manufacturing; Internet of Things equipment sales; Industrial control computer and system manufacturing; Industrial control computer and system sales; Bearing manufacturing; Bearing sales; Generator and generator set manufacturing; Generator and generator set sales; Wind turbine and parts sales; Metal structure manufacturing; Metal structure sales; Metal material sales; High-speed rail equipment and parts manufacturing; High-speed rail equipment and parts sales; Power transmission and distribution and control equipment manufacturing; Charging pile sales; New energy vehicle battery swap facility sales; Centralized fast charging stations; Electric vehicle charging infrastructure operation; Battery parts sales; Battery parts production; Energy storage technical services; Contract energy management; Photovoltaic equipment and components manufacturing; Photovoltaic equipment and components sales; Solar power generation technical services; Gas, liquid separation and purification equipment manufacturing; Gas, liquid separation and purification equipment sales; Pump and vacuum equipment manufacturing; Pump and vacuum equipment sales; Hydraulic power machinery and components manufacturing; Hydraulic power machinery and components sales; Instrument manufacturing; Electronic product sales; Power distribution switchgear equipment manufacturing; Power distribution switchgear equipment sales; Petroleum product sales (excluding dangerous chemicals); Lubricating oil sales; Mechanical equipment research and development; Internet of Things technology research and development; Industrial Internet data services; Software development; Software sales; Information system integration services; Artificial intelligence application software development; Intelligent control system integration; Information technology consulting services; New material technology research and development; New material technology promotion services; Technical services, technical development, technical consulting, technical exchange, technology transfer, technology promotion; Special equipment repair; General equipment repair; Electrical equipment repair; Electronic and mechanical equipment maintenance (excluding special equipment); Transportation equipment leasing services; Mechanical equipment leasing; Leasing services (excluding licensed leasing services); Loading and unloading handling; Technology import and export; Goods import and export; Business training (excluding training and vocational skills training that require licensing); Labor services (excluding labor dispatch); Instrument sales.