Vehicle modification, vehicle sales, sales of engineering machinery vehicles, agricultural vehicles, tractors, lubricants, electromechanical products, metal materials (excluding precious and rare metals, tungsten, tin, antimony), hardware and electrical appliances, steel, and building materials; processing of auto parts and engineering machinery accessories; vehicle repair (limited to branch operations); foreign trade of self-operated products; house leasing; used car sales; sales of automotive decorative accessories; motor vehicle insurance services; motor vehicle registration agency; design, production, and publication of domestic advertisements; car rental; ground parking lot services; automotive technology development, technology transfer, technology consulting services; business information consulting services.