Manufacturing of general parts; processing of mechanical parts and components; repair of general equipment; repair of specialized equipment; vacuum coating processing; electrophoretic coating processing; spray coating processing; quenching processing; electroplating processing; metal surface treatment and heat treatment processing; sales of metal materials; wholesale of hardware products; retail of hardware products; sales of building materials; manufacturing of molds; installation services for general mechanical equipment; maintenance of transportation facilities; technology import and export; goods import and export. Licensed items: installation, modification, and repair of special equipment; maintenance of railway rolling stock; manufacturing of railway transportation infrastructure equipment.