Introduction to the official road of the Tang Dynasty: The official road of the Tang Dynasty next to Dingshi Ancient Village still retains the imprints left by horse hooves and cars on the road, as well as the traffic monument on the stone wall next to it, all implying that this was once a very long road. Busy traffic arteries. This road was the only way to transport salt from the Central Plains to all parts of the world during the Tang Dynasty.