Once he traveled through time, he became the prince Li Chengqian who had a tragic ending in history. It coincided with the darkest moment of the bloodbath of the Xuanwu Sect and the change of power in the Tang Dynasty. An eight-year-old child's body hides an adult's soul, and he can see through the cold truth of the game of imperial power. He has no love for brute force and specializes in tapping people's hearts. He resolves life and death crises in public, subdues loyal enemy generals, and silences the world with his kindness, paving the way for Li Shimin to stabilize his rule. He went to the border fortress to sit in Lingzhou, predicting the collusion of foreign enemies in rebellion, strategizing, and using his youthful wisdom to stabilize the turbulent country in the early Tang Dynasty.