Research and development of mechanical equipment; sales of mechanical equipment; manufacturing of special equipment (excluding manufacturing of licensed professional equipment); research and development of automobile parts; manufacturing of automobile parts and accessories; wholesale of automobile parts; retail of automobile parts; professional design services; manufacturing of high-speed rail equipment and accessories; sales of high-speed rail equipment and accessories; research and development of motorcycles and parts; wholesale of motorcycles and spare parts; retail of motorcycles and spare parts; manufacturing of motorcycle parts; processing of mechanical parts and parts; sales of mechanical parts and parts; manufacturing of photovoltaic equipment and components Manufacturing; sales of photovoltaic equipment and components; sales of charging piles; manufacturing of household appliances; sales of station hydrogenation and hydrogen storage facilities; manufacturing of smart home consumer equipment; sales of smart home consumer equipment; manufacturing of metal structures; sales of metal structures; mold manufacturing; sales of molds; recycling of productive scrap metal; processing of renewable resources; sales of renewable resources; integrated circuit chip design and services; manufacturing of integrated circuit chips and products; sales of integrated circuit chips and products; goods import and export licensing projects: design and production of civil aircraft parts