Fei Yi 肥義 served King Wuling of Zhao 趙武靈王 (r. 325-299) and suggested to him strengthening the military. Under the reign of King Huiwen 趙惠文王 (r. 298-266), Fei Yi served as counsellor-in-chief. During the rebellion of Prince Zhang 公子章 and Tian Buli 田不禮, he was killed.