In fact, the narrow passage of Liaoxi Corridor is rarely seen in history textbooks, and what we hear more is Hexi Corridor. Before Song and Liao Dynasties, western Liaoning was almost barren, and it was not even fully open. Later, with the rise of Liao country in the northeast, western Liaoning began to play its strategic role, and the western Liaoning corridor, as one of the passages, was built in the Ming Dynasty, becoming an important military artery and a battleground for all military strategists. Its military strategic position can be reflected in the following aspects.

First, the shortest necessary passage carefully study the geographical location of western Liaoning on the map, and we can clearly see the characteristics of its geographical location. Western Liaoning lies between the northeast of China and the North China Plain. In other words, if the nationalities in the northeast want to enter the Central Plains, or if the strength of the North China Plain wants to develop abroad, both must pass through western Liaoning. The terrain in western Liaoning is steep, and there are only three roads for peers. The western Liaoning corridor is the fastest choice. Therefore, the western Liaoning corridor is the only choice for external forces to enter the Central Plains with the lowest consumption.

Second, Shanhaiguan city is easy to defend but difficult to attack. Because the Shanhaiguan was built in the western Liaoning corridor in the Ming Dynasty, the military occupation status of the western Liaoning corridor could not be the same as in the past. Shanhaiguan is built at the entrance of Liaoxi Corridor to North China Plain, while the northern part of Shanhaiguan is connected with Yanshan Mountains, and the southern part is a vast sea area. If the external enemy forces want to invade the North China Plain, they must pass through the Western Liaoning Corridor, and the first thing is to break through Shanhaiguan City. But it's not easy. As soon as Shanhaiguan was built, it directly seized the entrance of external forces into the North China Plain, forming a situation that it was easy to defend but difficult to attack.

Since ancient times, feudal dynasties have tried to use the power of artificial construction and steep areas to form a natural barrier that is easy to defend but difficult to attack to prevent foreign enemies from invading. Although it is rarely mentioned in history, the western Liaoning corridor plays an important role in military strategy. It plays an important role in the peace and tranquility of the Central Plains.