Import and export of goods; import and export of technology; research and development of new material technology; manufacturing of high-performance fibers and composite materials; sales of high-performance fibers and composite materials; manufacturing of plastic products; sales of plastic products; manufacturing of new membrane materials; sales of new membrane materials; mold manufacturing; mold sales; additive manufacturing equipment manufacturing; additive manufacturing equipment sales; automobile parts research and development; automobile parts and Manufacturing of accessories; wholesale of auto parts; retail of auto parts; remanufacturing of auto parts; manufacturing of new building materials (excluding hazardous chemicals); manufacturing of building decoration, plumbing pipe parts and other construction metal products; manufacturing of lightweight building materials; sales of lightweight building materials; sales of building materials; sales of thermal insulation and sound insulation materials; sales of building decoration materials; motorcycles R&D of vehicles and parts; retail of motorcycles and spare parts; wholesale of motorcycles and spare parts; manufacturing of motorcycle spare parts; retail of bicycles and spare parts; wholesale of bicycles and spare parts; sales of electric bicycles; sales of off-highway recreational vehicles and spare parts; manufacturing of off-highway recreational vehicles and spare parts; sales of recreational boats and sports boats; sales of fishing gear; sales of new energy vehicle battery swapping facilities; Sales of new energy vehicle electrical accessories; sales of new energy vehicle production and testing equipment; sales of charging piles; rental of charging control equipment; sales of battery spare parts; battery sales; ferrous metal casting; non-ferrous metal casting; sales of high-performance non-ferrous metals and alloy materials; sales of high-quality special steel materials; manufacturing of forgings and powder metallurgy products; sales of forgings and powder metallurgy products.