He was a member of the Wu Pei branch of the Pei clan. During wartime chaos, his great-grandfather fell off a cliff leaving his wife and mother without successors. Lord Yi voluntarily became the adopted heir and entered into a Jian-si succession marriage with the widowed sister-in-law. His great righteousness is praised by all, and sacrifices are offered to him every year. The Yuhang branch flourished because of him.
