Introduction to the Ancient Cliff Road: The foot of the Shentan Grand Canyon was the Yuncheng Official Road from Yanchi in Yuncheng to the Yellow River Ferry in ancient times. Because of its steep mountains and impassable roads. It is difficult for ordinary people to enter, and there are no officers and soldiers to guard it. Smugglers of smuggled salt take the opportunity to cross the canyon and come to the bank of the Yellow River to take a boat. Therefore, the canyon has become an ancient salt road leading to Henan and Shaanxi for smuggling smuggled salt. What are left on the stone wall now are the footprints of the ancients.