Feizi (非子) was a Zhou Dynasty Chinese royal horse trainer and breeder. He was a fifth generation descendant of E Lai, the famous bodyguard of King Zhou during the Shang Dynasty. King Xiao of Zhou rewarded Feizi with him the surname of Ying (嬴) and a fief in the city of Qin (秦邑, modern Tianshui, Gansu), which later became the state of Qin, whose rulers revered him as an ancestor, known as Qin Ying.