Manufacturing, sales, leasing and maintenance of engineering machinery and accessories, manufacturing and sales of mining machinery and accessories, concrete machinery and accessories, motorcycle accessories, R&D, manufacturing and sales of agricultural machinery, R&D, manufacturing and sales of special vehicles and new energy vehicles, manufacturing and sales of auto parts and automotive accessories, R&D, manufacturing, sales and installation of environmental protection equipment, sales of building materials, steel, rubber products, electrical components, labor protection supplies, electromechanical products, chemical products (except flammable, explosive and hazardous chemicals), and lubricants. Self-operated and agent import and export business of various commodities and technologies (except for commodities and technologies restricted by the state or prohibited from import and export). (Change from front-end to post-approval)