Yelü Bei (Chinese: 耶律倍) (born 899 -January 7, 937), also known as Yelü Tuyu (耶律突欲 or 耶律圖欲), posthumously honored Wenxian Qinyi Huangdi (文獻欽義皇帝) with the temple name Yizong (Simplified: 辽义宗, Traditional: 遼義宗), formally known as Ren Huangwang (人皇王, "imperial king of men") during his lifetime (including his period as the King of Dongdan), known as Dongdan Muhua (東丹慕華) (931) and then Li Zanhua (李贊華) (931-937) as a Later Tang subject, was the eldest son of Emperor Taizu of Liao, the founder of the Liao Dynasty. He was declared successor to the Emperor Taizu in 916, but never succeeded to the throne. Rather, after the accession of his younger brother Yelü Deguang (Emperor Taizong), he fled to the Shatuo Later Tang, where he was killed in 937.

Yelü Bei was born in 899, before the founding of the Khitan empire (which would later become known as Liao Dynasty). His father was the Yelü clan chieftain Yelü Abaoji, and his mother was Yelü Abaoji's wife Shulü Ping; he was their first son. He was described by the History of Liao as intelligent and studious in his youth, with a relaxed appearance and a loving heart.

In 916, when Yelü Abaoji declared himself emperor of a new Khitan empire as its Emperor Taizu, he created Yelü Bei his crown prince. When Emperor Taizu inquired of his attendants which god he should first offer sacrifice to as part of his becoming emperor, his attendants largely advocated offering sacrifices to the Buddha. When Emperor Taizu pointed out that the Buddha was not a Chinese god, Yelü Bei advocated offering first to Confucius. Emperor Taizu was pleased by the suggestion and built a temple for Confucius, having Yelü Bei offer sacrifices to him twice a year.

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