Research and development of reflective sign technology; manufacture, processing, sale, and installation services of traffic signs, sign poles, place name signs, reflective signs, road signs, door and building number plates, QR code identification signs, 3D code identification signs, vehicle license plates, ship plates, enamel signs, civil air defense and power safety signs, and anti-counterfeiting signs; production and maintenance installation services of traffic facilities; design and construction of road markings; door number data collection and positioning services, door number information coding services, sign design services; software research and development and application of multi-dimensional codes; advertising production, publication, agency, and design services; processing of fastening devices; sale of reflective vests, aluminum plates, plastic products, and reflective materials; printing of other printed matter (subject to printing operation license).