Since ancient times, the relationship between the emperor and Chu Jun has been very delicate, and it is also a fact that they are close to each other. However, in the face of highly centralized imperial power, the emperor and Chu Jun also have a natural power struggle, which is almost inevitable. Chu Jun is the future king, and there will be countless followers behind him. These people are not disloyal to the emperor, but if they want to be the center of power forever, they must have a good relationship with Chu Jun, so they become the supporters of Chu Jun, that is, their political investment. But this is very terrible for the emperor, who wants to have absolute control over the imperial power, but courtiers tend to Chu Jun, so in the court, the emperor's decision-making will be influenced by Chu Jun. If the political views of the emperor and Chu Jun are consistent, or Chu Jun is in line with the emperor's wishes, that's fine, but if the political views of the emperor and Chu Jun are different, they may seize power and suppress each other. Once the emperor loses power, the emperor will come to no good end.
There are too many such emperors in history, such as the overlord in the Spring and Autumn Period, who made great achievements in his life, making Qi one of the five tyrants in the Spring and Autumn Period. But in his later years, he was trapped in the harem by the villain and his son, and then starved to death. That's not all. In order to compete for the throne, his sons left his coffin unattended and let him die for more than a month. The body rotted before he was buried. After the death of the overlord of Tang Dynasty, he will leave a decent ending, which will shock any emperor. Therefore, Chu Jun was a threat to the emperor in history.
Emperor Chongzhen was the last emperor of the Ming Dynasty. Although he was very motivated and diligent, it was a pity that when the Ming Dynasty came into his hands, it was full of holes. Without extraordinary courage and ability, it is difficult to bring him back to life. Emperor Chongzhen obviously did not have the ability to revive the Ming empire except working overtime and being thrifty, and the decline of the Ming empire was a foregone conclusion. It may also be false to say that Emperor Chongzhen had no concept of national subjugation. After all, there were Jurchen and peasant uprisings in the north of the Ming Empire, and Emperor Chongzhen was definitely worried about the future of the Ming Empire. It's just that Emperor Chongzhen may be too optimistic and think that everything is still under control, at least the capital of the Ming Empire is safe, so it's very likely that he didn't make a correct prediction, or he didn't want to believe that the Ming Empire would be destroyed in his hands.
In fact, according to the situation at that time, if the prince could move to Nanjing, the capital, it could be said that it was a layer of insurance for the Ming empire. Nanjing originally had the same administrative system as Beijing. In case of an accident in Beijing, the prince can still reign in Nanjing, so the Ming Empire will not perish so soon, and the Qing Empire will not get a big bargain. When the Ming Empire was in turmoil, if Emperor Chongzhen agreed to let the Prince go south, it would probably rewrite history. Unfortunately, Emperor Chongzhen only considered the stability of his throne and was too suspicious of the prince, so he didn't agree to his request, and finally let the Ming Empire lose a chance to be reborn.