Xi of Yan

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Ji Xi, commonly referred to as "Xi, King of Yan" (Chinese: 燕王喜; fl. 255–222 BC; r. 255–222 BC) was the last monarch of the Yan state. He was the son of King Xiao whom he succeeded.^[1][1][2]

In the 28th year of his reign (227 BC), the Qin state began its conquest of Yan, and its army approached Yishui (易水; modern-day Yi County, Hebei). Seeing the threatening situation in which Yan was in, Crown Prince Dan, King Xi's son, sent assassins Jing Ke, Qin Wuyang and others to kill the Qin king Ying Zheng, under the guise of presenting him with a map of Dukang (督亢) and the severed head of the Qin general Huan Yi. As Jing Ke unrolled the map in front of Ying Zheng, the dagger was revealed, and the assassination failed. This failure only helped to fuel the rage and determination of Ying Zheng, who increased the number of troops sent to conquer Yan and ordered Wang Jian to destroy Yan. The bulk of the Yan army was at the frozen Yishui River. The Yan army was defeated in 226 BC and Ji Xi fled to the Liaodong Commandery. To appease Ying Zheng, Ji Xi had his own son executed by decapitation, and his head presented to Ying Zheng.

In 222 BC, Liaodong fell to Qin, and Yan was totally conquered by Qin under the general Wang Ben. Ji Xi was captured alive, and his fate is not known. Yan was the third last state among the Seven Warring States to fall, and with its destruction the fate of the remaining two Chinese kingdoms was sealed.