Bibliographical categories in the Chi-Know-Po library are modeled after theSuishu: Jingjizhi隋書經籍志 (Treatise on Classics and Collected Writings of the Book of Sui).Zi子 corresponds to the realm of thinkers (specilaists of confucian thought, taoist thought, legalism, moism, etc.). It encompassesxiaoshuo小說 (small talks) on events as well as writings onnong農 (agriculture) andyifang醫方 (curing and medecines). It brings together theHanshu: Yiwenzhi藝文志 (Treatise on Classics and Texts of the Book of Han) categories ofzhuzi諸子 (thinkers),bingshu兵書 (books on war) andfangji方技 (techniques and recipes). In later periods,leishu類書 (encyclopedias) were to be found in this bibliographical category (see for instance theSongshi宋史 (History of the Song).