King Zhaoxiang of Qin
In 306 BC, the young King Zhaoxiang ascended to the throne, with his mother Queen Dowager Xuan serving as regent. Knowing Qin could not focus on eradicating Yiqu when it had the hostile eastern states to deal with, and her son's rule was still shaky due to numerous rival princes keen to capture the throne, Queen Dowager Xuan decided to use an approach of pretended conciliation. She invited the king of Yiqu to live long-term in the Ganquan Palace, and consummated a seductive liaison that produced two sons with him. This completely removed the Yiqu King's hostility towards Qin, as the beguiled king had lost all cautiousness around the Queen Dowager. At the same time, King Zhaoxiang was aggressively acting to weaken rival warring states in the east and south, and Queen Dowager Xuan was secretly planning with her son the eventual annihilation of Yiqu.
Zhao Xing
Zhao Xing was the second son of King Zhao Yingqi, and his mother was a Han Chinese woman called (樛氏). In 135 BC, Zhao Yingqi was sent to the Han court by King Zhao Mo of Nanyue, to serve as Emperor Wu's guard (宿衛, "Sù wèi"). Before leaving for Chang'an, Zhao Yingqi had married a Yue woman and had his eldest son Zhao Jiande. While in Chang'an, he was married to Lady Jiu, and had his second son, Zhao Xing.