Modern history enthusiasts accidentally traveled through time and became Chai Rong, Shizong of the Later Zhou Dynasty in the late Five Dynasties and Ten Kingdoms period - the hero who should have died young and had his country stolen by Zhao Kuangyin. Facing the established trajectory of history, he relied on his familiarity with the history of the Five Dynasties to suppress his old physical illness, rectify the imperial army, check and balance the vassal towns, divide the Zhao family's power, and win over the hearts of the military leaders. He worked step by step in the chess game of troubled times, trying his best to prevent the tragedy of Chenqiao's mutiny and the yellow robe from happening again, single-handedly rewriting the fate of the later Zhou Dynasty, and reshaping the unification pattern of the Central Plains.
The whole book is really good.