He is the legitimate eldest son, the rightfully designated Crown Prince who has been seated for many years.
But because he lost his mother's protection at a young age, and with the favored concubine dominating the court, the influence of his mother's family was eliminated, leaving him weak and isolated at that time. Including the catastrophe that befell the Grand Master Residence, it was all related to that struggle for the heirship.
He couldn't protect her; if she stayed, there was only a dead end, and their child would be even less safe.
So he set up the play himself, forcing her to escape Beijing for the sake of their child and find Yue Tingfang in the south.
He exhausted all his resources to protect her from several waves of assassination attempts until she finally met Yue Tingfang successfully.
Including arranging for her to escape to Qi Mountain and persuading Tian Jizi to take them in—all these were the results of a huge sacrifice and a deal he made with Tian Jizi...
