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.
King Zhaoxiang of Qin
In 283 BC, King Zhaoxiang offered to trade 15 cities in exchange of the jade disc of He, which was in the state of Zhao's possession. King Huiwen of Zhao was attracted by the offer and agreed to the trade. However, the Zhao ambassador Lin Xiangru (藺相如) figured out that Qin never meant to hold up their end of the deal, and managed to return the jade back to Zhao. During the following three years (282 BC to 280 BC), Qin attacked Zhao multiple times, capturing cities such as Shicheng (石城), Lin (藺), Lishi (離石), Qi (祁) and Guanglang (光狼城), killing 20,000 men, and forcing Zhao to agree to send hostages and concede lands in exchange for returning the captured cities. During the armistice meeting held at Mianchi (澠池), King Zhaoxiang attempted to humiliate King Huiwen, but was forced to back down when Lin Xiangru threatened to physically harm the Qin king.