 Despite Bei voluntarily relinquishing his claim , Deguang , who had assumed the title of Emperor Taizong of Liao , viewed Bei as a threat . Bei still held the role of Prince of Dongdan , and moved back there after relinquishing his imperial claim . In order to break any potential power base Bei might form in Dongdan , Emperor Taizong ordered that the capital of Dongdan and all of its people move to what is now Liaoyang . Prince Bei himself was placed under surveillance by the Emperor . In 930 Prince Bei fled to the Later Tang , where he became an honored guest of Emperor Mingzong , who went as far as to bestow upon Prince Bei the Emperor 's own surname of Li ( 李 ) . There are two conflicting accounts of Prince Bei 's death : he was assassinated either in 936 by Emperor Mo of Later Tang in retaliation for the Khitans ' support in overthrowing the Tang and replacing it with the Later Jin , or in 937 by Emperor Gaozu of Later Jin ( Shi Jingtang ) as a show of loyalty to Emperor Taizong of Liao . 
