Ming Muzong was not a concubine or a chief, and under normal circumstances he should not be the heir to the throne at all! Moreover, until the forty-fourth year of Jiajing, a year before the death of Emperor Mingshizong Zhu Houxi, Ming Muzong was not the only candidate for the throne, and he also had a living younger brother, Zhu Zaizhen the Prince of Jinggong. The so-called only heir was only the matter of Jiajing forty-five years, this year Ming Muzong did have no competitors, but Ming Shizong also hung up
In the Ming Dynasty, the emperor was a person who could call the wind and rain, and Yan Song was the one who could shield the emperor from the wind and rain. Probably because he has been doing some unsightly things for Jiajing, so for a long time, it is inevitable that he will be tired, and he will begin to be tired of his position, for Jiajing, Yan Song is like a chess piece, useful for his own use, when it is useless, he will discard it casually, realizing the indifference of the imperial family, so Yan Song did not get close to The King of Yu.
In addition, during the Ming Dynasty, Shoufu had the right to support the imperial throne, and we can also know from some historical events that after the death of the Jiajing Emperor, Yan Song can be said to have the right to support the king of the clan as emperor, and at that time, Yan Song could unite with other clan kings to compete with Zhu Zaiyuan, so Yan Song chose to oppose Zhu Zaiyuan to the end in order to protect himself.