First of all, the place where Qin was hijacked was Yan State, not Zhao State. Secondly, the reason why he was sent to Yan as a hostage was to maintain the alliance between Qin and Yan. Qin, whose real name was born in 325 BC, is the son of Qin Huiwen and his concubine Qi Bazi. In the second year of his birth, Qin Huiwen became king on his own. This move made other vassal States feel a great sense of crisis, so the five vassal States of Wei, Zhao, Han, Yan and Chu jointly launched an attack on Qin in 3 17, but Qin successfully blocked their attack.

Later, in 3 14 BC, civil strife broke out in Yan State, and King Wuling of Zhao took the opportunity to help Yan Zhaowang, the son of Yan State who was a pledge in other countries at that time, ascend to the throne. In this process, Qin Huiwen, at the request of his son, sent troops to help Yan drive away the Qi army in the first 3 12 years. So after 3 1 1 became a prince, they became allies with Zhao and Qin. In order to maintain this alliance for a long time, King Huiwen of Qin sent his son Ying Ji to Yan as a proton. Later, it was not until 307 BC that Ying Ji returned to the State of Qin due to the sudden death of Wang Lie, the warrior of the State of Qin.

In the first 307 years, Lielie, the brother of the King of Qin, died young because he couldn't lift the tripod. Since he had no son at that time, the new candidate for the king of Qin could only come from his brothers. In this case, Ying Ji's mother, Qiu Bazi, wanted to wait for an opportunity to make her other son, Gongzi, the new king of Qin. However, King Wuling of Zhao, who had been paying close attention to the situation of Qin State, sent someone to send Ying Ji back to Qin State in Yan State at that time, and said that he would be the new King of Qin. Under the pressure of Zhao, Qibazi finally had to make a compromise.

Finally, with the support of King Wuling of Zhao and the mediation of Zi Bazi and his younger brother, Ying Ji succeeded in enthroning Zhao Haoqi, king of Qin Xiang. However, because the king of Qin was still young at that time, he was actually in charge of the Queen Mother Zi. This state lasted until 304 BC, when Qin Wangxiang reached the age of 20, and he could handle state affairs by himself.