Xu Shen
Meanwhile, in the eastern states, vulgar forms had become popular sooner; they also differed more radically from and more completely displaced the traditional forms. These eastern scripts, which also varied somewhat by state or region, were later misunderstood by Xu Shen, author of the Han dynasty etymological dictionary "Shuowen Jiezi", who thought they predated the Warring States Qin forms, and thus labeled them "gǔwén" (古文), or "ancient script".