When he was six years old, the late emperor died suddenly, and the prince Xiao Chengyuan was pushed to the dragon throne. Everyone in the court knew that this child was just a pawn in the hands of the regent Pei Tianheng. Outside, the Beishuo Empire was eyeing him, and inside, the clan, Yantie, border troops, and the inner court were all in the hands of Pei's party. Everyone felt that Emperor Yong would not survive until adulthood. But no one knew that from the day he ascended the throne, Xiao Chengyuan had hidden himself as a hidden thread. He pretended to be cowardly, sick, and incompetent, borrowing people from the palace, borrowing from poor families, borrowing from trade routes, borrowing from imperial examinations, borrowing from border troops, and borrowing from enemy countries, and buried people deep in the court one by one. Thirty years later, when Pei Tianheng thought he could finally depose the emperor and claim the title of king, he discovered that in the past thirty years, all the people in the court were Xiao Chengyuan's people, and even the enemy's court had already lost his son.
