Xu Da once said: "Although the last emperor of the Yuan Dynasty was only a barbarian, he was an emperor after all. If he is captured and handed over to your majesty, should your majesty make him a vassal or kill him directly? Although your majesty has ordered heaven, it is still a big violation to openly kill the former emperor. Such a hot potato, it is better to let him go. " But Chang Yuchun couldn't accept Xu Da's statement, so he made a wish to Zhu Yuanzhang, and Xu Da deliberately released Yuan Shundi.

But Zhu Yuanzhang did not dispose of Xu Da after seeing the paper. Obviously, Zhu Yuanzhang also agreed with Xu Da. Because, let Yuan Shundi escape, equivalent to the Yuan Dynasty to hand over Jiangshan, and it is in line with God's will. After all, Yuan Shundi is the king of a country. If he is killed, he will be charged with regicide, and letting Yuan Shundi go can not only win the heavenly heart, but also win the hearts of the people, killing two birds with one stone.

Lao Zhu himself said, "All our food and clothing were given by the Yuan Dynasty." Might as well drive him to the ends of the earth. Yuan Shundi, in the worst case, was also the emperor of the previous dynasty. If he died in a disorderly army, it would be disgraceful, and the establishment of the later dynasty would not be so justified. Zhu Yuanzhang couldn't help but think of the story that Xiang Yu killed Qin Ershi after overthrowing the rule of the Qin Dynasty, but was killed by Liu Bang. So he thought carefully and acquiesced in Xu Da's release of Yuan Shundi twice.

Liu Bowen, Zhu Yuanzhang's strategist, also enlightened Lao Zhu and said, "Does the emperor still remember the story of Guan Yu Huarong letting Cao Cao go in the Romance of the Three Kingdoms?" Zhu Yuanzhang suddenly realized that he praised Liu Bowen's "coup to secure the world".