Yuan Tiangang said that the Tang Dynasty could last until the sow climbed the tree. How to understand this sentence?

Yuan Tiangang is a native of Shu in Cuba, that is, the advanced Sichuan area. Yuan Tiangang is a metaphysician and astronomer. To put it bluntly, you can look at the stars, predict bad luck, and even calculate fortune by looking at people's faces. Once upon a time, Yuan Tiangang also made a living by divination. It is said that Yuan Tiangang's aim is extremely high, and you can know that he is out of luck by hearing the wind.

We all know that ancient people were superstitious, especially those in the palace. Li Shimin is no exception. When he became emperor, he just wanted to live forever. He wanted to know how long his Li Jiangshan would last. After Li Shimin got a wizard like Yuan Tiangang, he often asked Yuan Tiangang to show his face to the people around him to see if he could help Datang Jiangshan to be stable and available. We all know that the rule of chastity appeared in the Tang Dynasty. At that time, the Tang Dynasty was a miraculously desirable country in the world, which was developed in all aspects. Foreign envoys often come to the Tang Dynasty to learn advanced technology. Therefore, Li Shimin certainly hopes that this prosperity will last forever.

One day, Li Shimin called Yuan Tiangang to his side and asked, "How long can this great Tang Dynasty last?" ? Metaphysics genius Yuan Tiangang naturally stumped this question. He knew that it was destroyed by Zhu Wen in 907. You are like a tiger. Telling the truth will be beheaded, so Yuan Tiangang pointed to a nearby tree and said, "Wait until the sow gets on the tree." Li Shimin was naturally happy after hearing this, because everyone knows that sows can't climb trees, which means that Datang will last forever.

So why did Yuan Tiangang say that? The sow represents Zhu's surname. During the Tang Dynasty, the Li family was alive. The word Li Can is divided into Mu Zi, and this tree is also called wood. So what Yuan Tiangang means is that Zhu rode on Li's head, and the Tang Dynasty perished.