Manufacture of railway locomotive and rolling stock parts; Sales of railway locomotive and rolling stock parts; Manufacture of high-speed rail equipment and accessories; Sales of high-speed rail equipment and accessories; Processing of mechanical parts and components; Sales of mechanical parts and components; Sales of specialized equipment, key systems and components for rail transit; Manufacture of urban rail transit equipment; Manufacture of electrical signal equipment devices; Sales of electrical signal equipment devices; Spray coating processing; Professional cleaning, washing and disinfection services; Metal cutting processing services; Metal surface treatment and heat treatment processing; Manufacture of lighting fixtures; Sales of lighting fixtures; Manufacture of mechanical and electrical equipment; Sales of mechanical and electrical equipment; Repair of electrical equipment; Manufacture of automotive parts and accessories; Sales of automotive decoration products; Manufacture of automotive decoration products; Sales of coatings (excluding hazardous chemicals); Repair of specialized equipment; Manufacture of general equipment (excluding special equipment); Repair of general equipment; Sales agency; Rental services for transport equipment; Labor services (excluding labor dispatch); Rental of non-residential real estate; Leasing services (excluding licensed leasing services); Sales of packaging materials and products; Information technology consulting services