Ferrous metal casting; manufacturing of metal processing machinery; manufacturing of casting machinery; sales of casting machinery; manufacturing of metal tools; manufacturing of non-ferrous metal alloys; sales of rail transit engineering machinery and parts; manufacturing of urban rail transit equipment; manufacturing of automotive parts and accessories; retail of automotive parts; metal surface treatment and heat treatment processing; processing of metal waste and scraps; sales of building materials; sales of chemical products (excluding licensed chemical products); information technology consulting services; recycling of productive scrap metal; processing of renewable resources; manufacturing of railway locomotive and rolling stock parts.