The so-called "Khan handed over to Prince Fu Cha's Tower to China and Yu Wang's Water Conservancy God Book" is intended to describe "Khan" as the predecessor of Dayu in China. In fact, the myth that "Dangen is the ancestor of the Korean nation" appeared very late. It was not until13rd century that a monk appeared for the first time in The History of the Three Kingdoms. According to the book, this "Dangong" is the son of the Emperor of Heaven, and his arrival ruled Korea at the same time as Emperor Yao's time in China. It is said that "Dangong" reigned 1.500 years and lived 1.908 years. Later, he took the initiative to give way to Ji Zi from China, becoming the "skipping North Korea" in history. Said South Korea never belonged to China. The purpose of denying historical facts is nothing more than to get rid of China people's consciousness and establish their sense of belonging and identity in the hearts of the people on the Korean Peninsula. A few years ago, the Democratic People's Republic of Korea claimed that it had found the tomb of Dangong. There are "human bones as beautiful as white jade as long as 3 meters" in the tomb. To this end, North Korea also specially allocated huge sums of money to build the "Tanjunling". However, countries all over the world, including a part of South Korea, do not attach importance to this point. Because even the bodies of people 5,000 years ago, there are no written records in these 5,000 years. How can it be concluded that it is "the ancestor of the Korean nation"? After all, the "Tangong Myth" first appeared in the13rd century, and there was a gap of four or five thousand years before that. If there are really strange people in history who can live 1908, it is absolutely impossible to wait four or five thousand years before being "recorded" by a monk.