Energy-saving management services; technical services, technical development, technical consulting, technical exchange, technology transfer, technology promotion; solid waste treatment; solid waste detection instrument and meter sales; solid waste detection instrument and meter manufacturing; environmental protection special equipment sales; environmental protection special equipment manufacturing; auto parts retail; auto parts wholesale; general parts manufacturing; auto parts and accessories manufacturing; railway locomotive and vehicle parts sales; special equipment sales; high-speed rail equipment and accessories sales; rail transit engineering machinery and parts sales; rail transit green composite material sales; rail transit special equipment, key systems and parts sales; high-performance fiber and composite material sales; mechanical parts and components processing; mechanical parts and components sales; special equipment manufacturing (excluding licensed special equipment manufacturing); high-speed rail equipment and accessories manufacturing; spring sales; spring manufacturing; general equipment manufacturing (excluding special equipment manufacturing); wind turbine generator set and parts sales; new energy original equipment manufacturing; seal manufacturing; high-performance sealing material sales; seal sales; new material technology research and development; glass fiber reinforced plastic product manufacturing; glass fiber reinforced plastic product sales; plastic processing special equipment manufacturing; plastic processing special equipment sales; mold manufacturing; mold sales; chemical product sales (excluding licensed chemical products); metal material manufacturing; metal material sales; technology import and export; goods import and export; textile and raw material sales; textile and knitwear sales; rubber product manufacturing; rubber product sales; hydraulic power machinery and component manufacturing; pneumatic power machinery and component manufacturing; hydraulic power machinery and component sales; pneumatic power machinery and component sales; plastic product manufacturing.