Sima Qian’s Shiji says Ying Zheng was born in Handan, in the state of Zhao, while his father was held there as a Qin hostage. The account gives his birth in 259 BCE and says he became king at thirteen after his father’s death. As a boy ruler, he initially entrusted affairs of state to senior ministers. The Shiji is a Han-dynasty history written more than a century after the events; it is indispensable evidence, but its narratives should be read as a historian’s account rather than a transcript. Modern museum histories likewise identify Ying Zheng as the young king who inherited Qin during the Warring States period.
Qin was one of several competing states. Its rulers had already expanded territory and developed a powerful administration and army. Ying Zheng inherited that state, not an already unified China. The central story of his reign is the conquest of the remaining rival kingdoms and the transformation of a successful state into an empire.

