Three imperial libraries

In 213 BC during the reign of Emperor Qin Shi Huang most books were ordered destroyed. The Han Dynasty (202 BC – 220 AD) reversed this policy for replacement copies, and created three imperial libraries. Liu Xin a curator of the imperial library was the first to establish a library classification system and the first book notation system. At this time the library catalog was written on scrolls of fine silk and stored in silk bags. Important new technological innovations include the use of paper and block printing.