Will the Heir Be in Trouble After Exchanging Bodies with the Deposed Prince?

Traveling through palace battles and officialdom, a modern female college student has just graduated from graduate school. She travels to the Tang Dynasty before starting her good life and becomes Li Jiancheng's fiancée. An accident occurs during the wedding night and she exchanges souls with Li Jiancheng. From then on, she starts a survival story in hell mode. She has just adapted to her identity change. Change, but it is of no use. I tried hard to reduce the sense of existence and pushed Li Shimin to the top, hoping that he would be able to lie down for the rest of his life. However, no matter how hard he tried, he could not get Li Shimin's camp. Instead, he tried to protect Li Yuan's longevity and stay in power as long as possible. After helpless failure, he tried his best to rise up, and finally succeeded in taking office.