The "Battle of Jingnan" in the early Ming Dynasty has always been talked about by people. The reason for this is that the Jianwen Emperor Zhu Yunjiao set an embarrassing record of "an emperor can't do a king of a domain", breaking the absolute authority of the "emperor" and also achieving the great reversal myth of Ming Chengzu Zhu Di. Whether it is from the perspective of the number of troops, equipment, manpower, material and financial resources, the Jianwen Emperor Zhu Yunjiao has an absolute advantage. However, he finally turned the Wang Bomb and the four twos in his hand into a thin mess, allowing Zhu Di, the King of Yan, to complete the "impossible" reversal.
Zhu Yuanzhang had 26 sons, but he favored the eldest son, Zhu Biao. There are political considerations about the inheritance of the throne, and there is also Zhu Yuanzhang's personal emotional tilt towards Empress Ma. But more importantly, Prince Zhu Biao's own personal ability and prestige were the best among Zhu Yuanzhang's princes. Zhu Biao is the prince, and everyone obeys! It is no exaggeration to say that even if Zhu Yuanzhang zen Zhu Biao, Zhu Biao has enough ability to bring the Ming Dynasty to the right track. This is Zhu Biao's absolute hard power, not where others can compare.
The choice of Zhu Di was premeditated by Zhu Yuanzhang. Before Zhu Yuanzhang's death, among his sons, Zhu Di, the oldest of the old Four Yan kings, was also one of the most powerful clan kings. If it is said that after Zhu Yuanzhang's death, the most likely person to threaten Zhu Yunjiao's throne was Zhu Di, the King of Yan. If Zhu Yuanzhang could depose or directly kill Zhu Di at the last moment, then not only did zhu Yunjiao solve one of the biggest opponents, but also played a role in deterring other clan kings.
So, did Zhu Di really come to Nanjing? I think he must have arrived in Nanjing. Because he did not go to Nanjing, the mere crime of resisting and disobeying the will was enough for Zhu Di to drink a pot, and Zhu Di could not afford it. Zhu Di not only arrived in Nanjing, but also fully understood Zhu Yuanzhang's intentions. Zhu Di is the most like Zhu Yuanzhang among Zhu Yuanzhang's many sons, because they are the same kind of people and know each other's ideas best. Zhu Yunjiao chose to turn a deaf ear to Zhu Yuanzhang's questioning because he was afraid that the throne in his hands would be taken away. Zhu Di was reluctant to enter the palace to see Zhu Yuanzhang because he did not want to die. The three grandsons had their own ideas and speculations, which eventually led to Zhu Yuanzhang's final "knife" not succeeding in the shot, and also laid the groundwork for the outbreak of the "Battle of Jingnan" later.