Liu Xu (Chinese: 劉昫; 888–947), courtesy name Yaoyuan (耀遠), formally the Duke of Qiao (譙公), was a Chinese historian and politician of the Chinese Five Dynasties and Ten Kingdoms period states Later Tang and Later Jin, serving as a chancellor during both of those short-lived dynasties. He was the lead editor of the Old Book of Tang, one of the official histories of the preceding Tang dynasty, completed during Later Jin, although most of the work was probably completed during the term of his predecessor Zhao Ying. Source: Wikipedia (en)