Because Zhu Yuanzhang issued an edict on his deathbed for King Yan to return to the capital, but the prince tampered with the edict so that King Yan could not return to the capital. Therefore, before Zhu Yuanzhang died, he kept asking if King Yan had come back. In fact, No minister dared to answer, and those ministers didn't know how to answer, so no one spoke. In fact, when the prince saw that Zhu Yuanzhang called King Yan back, he was afraid that he would pass the throne to King Yan, so he changed the imperial edict privately.

Zhu Yuanzhang can be said to be a very remarkable figure. From a farmer to a ruthless emperor, he not only made himself a legend throughout the ages, but also established the Ming Dynasty. In the early years, he drove the Mongolian soldiers very forcefully. Outside the border fortress, he also took back all the military power of the generals. It can be said that he is a very capable person. His favorite candidate for emperor at the time was Prince Zhu Biao, but Zhu Biao passed away early. Later, he felt that none of his sons were outstanding, so he began to train Zhu Biao's son to inherit the throne.

This made Zhu Di, who was the son of Zhu Yuanzhang at the time, very angry. He had no complaints when he appointed Zhu Biao as the crown prince. After all, Zhu Biao was the legitimate son. Now that Zhu Biao was dead, he still didn't consider it. He became the prince himself, and later he used some means to finally take the throne. In fact, Zhu Yuanzhang still loved his son very much, so before he died, he ordered that no princes were allowed to enter the capital, and only quietly ordered that King Yan Return to Beijing.

This move frightened Zhu Di very much. He was afraid that Zhu Yuanzhang would pass the throne to King Yan, so he tampered with the imperial edict so that King Yan could not return to Beijing, so that Zhu Yuanzhang did not see King Yan before his death. In fact, Analyzing from historical records, Zhu Yuanzhang actually wanted to take back the military power in his hands and preserve Zhu Di's throne when he asked King Yan to return to Beijing. However, in the end King Yan did not enter Beijing, and within a few years King Yan rebelled.