What is the historical story of this idiom? What warning does it give us?

We all know the idiom kick down the ladder, which means that after you get this person's help, you pretend nothing happened. So what kind of historical story does this idiom have for us? Let's take a look together.

As the name implies, I kicked down the bridge after crossing the river myself. In order to prevent others from crossing the river, I would turn around and tear down the bridge. So what is the historical story of this idiom? Yes, there was a man named Youren Xu in the Yuan Dynasty. When he was a child, he read many classics, passed the imperial examination and entered the officialdom, and was gradually promoted to participate in politics. However, when Yuan Shundi was ready to abolish the imperial examination system, Youren Xu objected and argued with the officials who were in favor of abolishing the imperial examination system. When the imperial edict was issued, Yuan Shundi deliberately made Youren Xu kneel on his head to listen, and Youren Xu reluctantly did so. What happened after he left North Korea? Yu Shihua, a scholar in charge of books, laughed at Youren Xu and said, "You passed the imperial examination, and now you are the first person to kneel down after reading the imperial edict to abolish the imperial examination. What it really means is to burn down the bridge after you reach your goal. In life, we often meet such people, but it is not a kind of luck. It is the best way to stay away from such people.

So what does this idiom tell us? In life, we should be grateful for this drop of water. When we return to the earth in spring, we must never kick down the ladder, which will only make others hate you more and more. When you kick down the ladder, you can only treat him in the same way. When she wants to talk to you in the future, shut her out and make him feel that she will deal with you as you deal with her, and be jealous of her. After learning this lesson, she should kill the donkey herself.

This is the historical story of kicking down the bridge. This is the origin and allusion of this idiom.