 During the Song Dynasty, it was expanded into the 1011 CE "Guangyun" (廣韻 "Expanded Rimes") and the 1037 CE "Jiyun" (集韻 "Collected Rimes").The clear problem with these old phonetically arranged dictionary is that the would-be user needs to have the knowledge of rime.Thus, dictionaries collated this way can only serve the literati.