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.
Jian of Qi
The kingdom of Qi was the only opponent of Qin after Qin Shi Huang conquered every other state. King Jian and his prime minister Hou Sheng (后勝), a relation of Jian's wife, sent the Qi army to the western border of Qi to protect the country; but Qin general Wang Ben (王賁), son of Wang Jian, attacked Qi from the north instead and conquered it in 221 BC, completing Qin's unification of China.