Manufacturing of intelligent in-vehicle equipment; sales of new energy vehicles; sales of automobiles; wholesale of auto parts; sales of construction machinery; repair of specialized equipment; manufacturing of agricultural machinery; manufacturing of construction machinery; manufacturing of mining machinery; manufacturing of auto parts and accessories; manufacturing of narrow-gauge locomotives and rolling stock; manufacturing of railway locomotive and rolling stock parts; sales of railway locomotive and rolling stock parts; leasing of mechanical equipment; sales of specialized tunnel construction machinery; sales of rail transit engineering machinery and components; sales of material handling equipment; sales of intelligent material handling equipment; manufacturing of specialized machinery for building materials production; manufacturing of general equipment (excluding special equipment); sales of mechanical equipment; sales of mining machinery.