In the middle of the third century BC, Chinese history entered the end of the Warring States Period. In the Qin State, the famous King Zhaoxiang of Qin died of old age, and the seriously ill Crown Prince An Guojun ascended the throne and made his illegitimate son Yiren the crown prince. The Queen Lady Huayang, who was from the royal family of Chu, took charge of the state power. She was also Yiren's biological mother.