What Are the Sixteen Prefectures of Yanyun to Me? I Want the Whole World

Chai Rong was supposed to eliminate the ills of the Five Dynasties, destroy the Ten Kingdoms, and unite the realm, but overwork brought his life to a regrettable end. Heaven gave him another chance, sending his soul into the body of Fusu of the Qin Dynasty. In this Qin, calm on the surface but roiling beneath, how will Chai Rong prolong the life of this short-lived dynasty? He will crush the remnants of the Six Kingdoms and restore China. (Some parts of the story do not match historical fact, so I hope readers will bear with me. If you spot any mistakes, please point them out.)