Permitted items: Manufacture of road motor vehicles; Class III medical device operations; Construction engineering construction. General items: Manufacture of specialized equipment (excluding specialized equipment requiring permits); Manufacture of environmental protection specialized equipment; Wholesale of auto parts; Research and development of auto parts; Manufacture of auto parts and accessories; Manufacture of general equipment (excluding special equipment); Processing of mechanical parts and components; Sales of mechanical parts and components; Retail of auto parts; Research and development of mechanical equipment; Manufacture of construction machinery; Sales of automobiles; Sales of new energy vehicles; Sales of environmental protection specialized equipment; Sales of metal products; Sales of building materials; International freight transport agency; Domestic freight transport agency; Sales of Class I medical devices; Sales of Class II medical devices; Residential property leasing; Non-residential property leasing; Agricultural professional and auxiliary activities.