Catering services; Retail of tobacco products; Sales of food. General items: Import and export of goods; Import and export of technology; Sales of railway locomotive and rolling stock parts; Sales of high-speed rail equipment and accessories; Sales of rail transit special equipment, key systems, and components; Sales of bearings, gears, and transmission components; Manufacturing of power distribution switchgear equipment; Sales of power distribution switchgear equipment; Manufacturing of fasteners; Sales of fasteners; Sales of mechanical parts and components; Retail of electronic components; Sales of metal materials; Wholesale of hardware products; Retail of hardware products; Sales of lighting fixtures; Sales of instruments and meters; Sales of plastic products; Sales of rubber products; Sales of power electronic components; Wholesale of electronic components; Sales of charging piles; Manufacturing of batteries; Sales of battery parts; Wholesale of cosmetics; Retail of cosmetics; Graphic design and production; Catering management; Information consulting services (excluding licensed information consulting services); Hotel management; Conference and exhibition services; Technical services, development, consulting, exchange, transfer, and promotion; Manufacturing of high-performance fibers and composite materials; Production of special labor protection products; Sales of special labor protection products.