Why did Kangxi think that "the Great Wall of Wan Li is empty in Wan Li" and the defensive value of the Great Wall is useless?

Wan Li Great Wall is empty in Wan Li? When Kangxi visited the Great Wall, he saw a poem written by Zhang on the Great Wall. Wan Li Great Wall Wan Li is empty, immortal hero immortal dream? It shows that the rise and fall of a dynasty cannot be resisted by a wall, which is consistent with Zhang's point of view. ?

Is the Great Wall really that useful?

Since the construction of the Great Wall word Qin Shihuang, it has played a certain role in resisting the invasion of nomadic tribes in the north, but it has never stopped their iron hoofs and often plundered the property of the people in the Central Plains. During the Han dynasty, to avoid the invasion of Xiongnu, we should adopt the method of affinity. During the Tang Dynasty, Turks harassed the border all the time. The Northern Song Dynasty was suppressed by Qidan, and the Southern Song Dynasty was destroyed by Mongolian fighters. The Ming Dynasty also spent huge sums of money to build the Great Wall, which was inevitably invaded by the Tatars. So, the Great Wall of Wan Li is empty in Wan Li, which is really the way it is. ?

The downfall of dynasties was caused by their own reasons, not by a Great Wall.

From the Qin dynasty to the Qing dynasty, those dynasties occupied by foreigners were all caused by their own corruption, like Wei, Jin, Southern and Northern Dynasties? Five random China? Is it from the Western Jin Dynasty? Eight Kings Rebellion? The internal killing each other made the Hu people outside the customs take the opportunity to enter, which led to the Central Plains in the north being carved up by Hu people, and the history of China entered the darkest period.

During the Northern Song Dynasty, conservatives and reformists were fighting, but you put me on the stage and finally brought me to my own destruction. Later, they were cheated by the Jin people and joined forces to destroy the Liao country, thus making the Jin country have no rivals and dominate the country. Finally, they ate the Northern Song Dynasty in turn and acted as grave diggers for the later Yuan Dynasty.

The same was true at the end of the Ming Dynasty, when the Lindong Party and the Yen Party fought to the death, leading to sharp domestic contradictions and people's poverty. The oppressed people had to struggle, and a peasant uprising broke out in Li Zicheng. The Ming Dynasty was defeated inside and outside, and was quickly wiped out by Li Zicheng.

People's hearts and national strength are an iron wall that will never fall.

Rulers of past dynasties regarded the Great Wall as a glimpse of the city wall, thinking that the city wall could be safely repaired, but they didn't know that the Great Wall was a long pass there. There were no flightless birds, and even the thick city wall was broken. But what is more valuable than the Great Wall is people's heart and national strength. The strongest wall is actually the human heart. Only with one heart and one mind, only with its own strength, can the Great Wall become an impregnable iron wall. The best defense is to lose without a fight. Enemy soldiers rely on strong national defense strength, not the Great Wall.

As the ruler of the Qing dynasty, Xi has been fighting for the first half of his life and won many victories. He thought that the world could be conquered by force, and then the world was basically peaceful, but new problems emerged one after another, such as corruption in official management, deficit in the state treasury, cronyism of court officials and the struggle for power and position by governors, which made him a mess.