As the "Hexi's throat" in the history of China, the Great Wall of China has turned over the Gobi to cross the desert and stretched out into the distance. Since the Ming Dynasty, the military defense responsibility here is a top priority. The Guanzhongguan is surrounded by piers and columns. The small and small size of nearly forty piers constitutes an important military defense base for Jiayuguan. Among the many piers, seven kilometers south of Guancheng, the first pier in the world above the steep cliffs is the most amazing. This is the Dadengtai built by Li Han, the military road of Suzhou, Gansu Province in the 18th year of Jiajing in the Ming Dynasty. It is the southernmost pier of the Jiayuguan Great Wall and the most western pier of the Ming Dynasty. It is the connection. The important piers of the Guannan and Qilian Mountains are located next to the Grand Canyon of the Shulai River. They are also called the Great Wall First Pier and Shu Lai Dun. The northwestern terrain is in a dangerous place. The pier stands on the cliff nearly 56 meters high near the river, and it can be retreated. This is also the biggest reason why the first pier is chosen to be built here. Traffic: The first pier of the Great Wall is located 7 kilometers south of Jiayuguanguan City. It can only be chartered to go, Guancheng, Cantilever Great Wall and Great Wall First Pier chartered 150-180 yuan, single attraction chartered 50 yuan. Tickets: Tickets (including Jiayuguan Guancheng, Great Wall Museum and Cantilever Great Wall), peak season (May 1st - October 31st) 120 yuan / person, off season (November 1 - April) 30th) 100 yuan / person,