Liu Xin completed
七略 (Seven Epitomes), the first systematic catalogue of the imperial library — the direct ancestor of the bibliographic treatise in the Book of Han (
汉书·
艺文志). He also championed the Old Text (
古文) school of classical scholarship and helped Wang Mang (
王莽) establish the short-lived Xin dynasty, for which he was killed when a plot against Wang failed.