It is a state-owned enterprise. ***** transportation engineering machinery leasing services, transportation logistics management services; office buildings, staff dormitory management; design, production, agency, release of lettering, light boxes, display signs, neon lights, electronic flip-flop devices, electronic displays, in-car advertising; sales of construction and decoration materials (excluding chemical hazards); conference services; conferences and exhibitions; automobile leasing (obtaining qualification licenses before practicing); advertising signs Bit rental; hardware retail; the acquisition and sale of agricultural and sideline products. ***** (except for projects subject to approval in accordance with the law, with a business license to carry out business activities independently in accordance with the law)