Huan Yi

Huan Yi was a general of the state of Qin in the late Warring States period (5th cent.-221 BCE). General Pang Nuan of Zhao occupied several towns of the state of Yan in 236 BCE, whereupon Yan asked the state of Qin for help. Huan Yi, Yang Duan, and Wang Jian commanded the relief campaign against Zhao and took its towns Ye (today's Linzhang, Hebei) and Anyang (Hebei), as well as Eyu (Heshun, Shanxi), and Liaoyang (Zuoquan, Shanxi).
In 234 BC, Huan Yi attacked Pingyang (Linfen, Shanxi) and Wucheng (Cixian, Hebei), killed general Hu Zhe and massacred 100,000 troops of Zhao. He then left Shangdang, passed the Taihang Ridge and invaded Zhao by taking Chili and Yi'an (Gaocheng, Hebei). Zhao thereupon laid the supreme command in the hands of Li Mu, who defeated Huan Yi in the battle of Fei (Jinxian, Hebei) and pushed him back out of Zhao, it was the last great victory of Zhao over Qin. Huan Yi was killed in this battle.
In popular culture.
Huan Yi is portrayed by the actor Lü Xiaohe in the film "The Emperor and the Assassin" (1998) and by Wang Ya'nan in the television series "Assassinator Jing Ke" (2004).
In the Manga and Anime Kingdom, he is portrayed as "Kan Ki", an ex-bandit leader nicknamed "The Beheader" and one of the new appointed "Qin Six Great Generals" for his prodigious skill for warfare relying mostly on unconventional tactics. He initially served as one of the Vice Generals in the Mougou Army alongside General Ou Sen, both under Mou Gou command.