 In 283 BC, King Zhaoxiang offered to trade fifteen cities in exchange for the Heshibi jade, 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.