In 234 BC, Huan Yi attacked Pingyang (Linfen, Shanxi) and Wucheng (Cixian, Hebei), killed general Hu Zhe and massacred 100,000 troops of Zhao.
Zhao thereupon laid the supreme command in the hands of Li Mu, who defeated Huan Yi in the battle of Fei (Jinxian, Hebei).
However in the Zhan Guo Ce (a different historical source) it's mentioned that Huan Yi later died attacking Handan, the capital of Zhao, which was defended by Li Mu in one of the last Qin-Zhao battles.
Jing Ke later took Fan Yuqi's head and a dagger forged by the male blacksmith Xu Furen (徐夫人) to meet the king of Qin.
Meanwhile, Fan Yuqi (Han O Ki in onyomi) is portrayed as a separate character who rebelled against Qin under Lao Ai with Lü Buwei‘s patronage before fleeing once the war was lost.