After Qin Shihuang unified the six kingdoms (from 221 BC to 210 BC), the world was initially settled, but contradictions were undercurrent. The implementation of the system of prefectures and counties was hindered. Under harsh punishments and centralized rule, officials lived on thin ice. Zhao Tuo (not Zhao Tuo, King of South Vietnam, the fictional character of the same name) was originally a child of a poor family in Daliang, Wei State, and had been familiar with it since he was a child. Legalist classics, witnessing the destruction of the motherland, firmly believe that "ruling the troubled times requires strict laws, and protecting the world depends on the people's support." He has a forbearing and tenacious character, good at making decisions without losing the bottom line. Under the centralized system of the Qin Dynasty, a survivor of the Six Kingdoms was promoted from a low-level official step by step, struggling between loyalty to the emperor, the rule of law and human nature, and finally exploring the true meaning of official career.