 First, the "Liexian Zhuan" was not listed in Ban Gu's 111 CE "Book of Han" "Yiwenzhi" ("Treatise on Literature") imperial bibliography, and the 636 "Book of Sui" was the first official dynastic history to record it bibliographically.However, the "Yiwenzhi" does list many works written and compiled by Liu Xiang, including two with similar titles