《宋书·志·卷十八》
《漠注》说： 戴进贤冠的话，帧巾宜加长耳，造就是现在的介帻。戴惠文冠的话，帧巾宜加短耳，这就是现在的平上帧。
《汉注》曰： 冠进贤者宜长耳，今介帻也；冠惠文者宜短耳，今平中帻也。
The "Notes on the Han" says: When wearing the Jixian Crown, the frame scarf should have long ears, which is the current Jinfu. When wearing the Huaiwen Crown, the frame scarf should have short ears, which is now called Pingtong (the flat frame scarf).