The Yanmen Pass Great Wall is located on the Yanmen Mountainside 20 kilometers northwest of Dai County, Shanxi Province. Together with Ningwuguan and Pianguan, it is collectively known as the "Three Passes". The nearby peaks and mountains are staggered, and the steep ravines are eerie. There is a road in the middle, winding and winding, passing through the city. It is extremely dangerous and has been an important garrison position in the past dynasties.
Historically, Yanmen was a double pass. The two passes were 5 kilometers apart. The ridges were connected by the Great Wall and were called Dongxingguan and Xixingguan. "The Biography of Emperor Mu" records: "In the Sino-Japanese War, the emperor marched to the west, and it was Jue Yu's Pass." King Mu of Zhou was the fifth king of the Western Zhou Dynasty, belonging to the early Western Zhou Dynasty. According to this calculation, Yanmen Pass existed around 1000 BC.
The Yanmen Pass rebuilt in the Ming Dynasty was called Dongxing Pass. This pass was a pass given to mankind by nature. It opened up the mountain barrier between the outside of the Great Wall and Xingnan. It played an important role in human history and occupied important historical position.