Automotive parts and accessories manufacturing (excluding automobile engine manufacturing); mechanical parts development; mechanical technology development services; new material technology development services; FRP material wholesale; coating material development; metal material development; procurement and sales of rail transit related materials and equipment; production of automotive interior products, rail equipment and supplies, railway equipment, and environmentally friendly new composite materials; processing of mechanical parts and components; manufacturing of plastic products, new energy vehicle parts, urban rail transit equipment, railway locomotive and rolling stock parts, and plastic materials; sales of automotive interior products, automotive parts, plastic processing special equipment, accessories, consumables, rail equipment and supplies, railway equipment, new decorative materials, environmentally friendly new composite materials, building decoration materials, and environmental protection materials; research and development of coatings, new decorative materials, special materials and new products, environmentally friendly new composite materials, and environmental protection materials.