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.
Duke Jing of Qi
Duke Jing was born to a concubine of Duke Ling of Qi. His mother was a daughter of Shusun Xuanbo, head of one of the Three Huan clans that dominated the control of power in the neighbouring State of Lu. When his father died in 554 BC, his older half-brother Duke Zhuang succeeded Duke Ling and killed Crown Prince Ya with the support of the powerful minister Cui Zhu (崔杼). However, Duke Zhuang had an adulterous relationship with Cui's wife, and was killed by Cui in 548 BC.