前贤著述中言古代文字之变迁者,当以汉许慎《说文解字序》为得其实。序言谓自皇古至秦,文字之变,大要有三。其文曰:“黄帝之史仓颉见鸟兽蹄(?)之迹,知分理之相别异也,初造书契。”又曰:“及(周)宣王太史籀著大篆十五篇,与古文或异。”则史籀以前,上推至仓颉,此一长时间之文字,皆得称为古文。又曰:“秦始皇帝初兼天下,丞相李斯乃奏同之,罢其不与秦文合者。斯作《仓颉篇》, The vicissitudes of the ancient texts used by the former ancestors were actually based on Han Xushen’s Preface to Shuo Wen Jie Zi. The preface says that from the time of the Emperor to the Qin, the text changed, and there should be three. His essay: “The history of the Yellow Emperor sees the bird’s hooves (?) in the history, and knows that the different phases of the division are different, the first book was created.” And said: “And (week) Xuan Wang Tai Shi Dazhao fifteen articles , and ancient or different.” Before the history of the gong, pushed to Cangjie, this long time text, have to be called ancient text. He also said: "At the beginning of the Qin Shidi Emperor and the world, the prime minister Li Si Nian played with it, and the striker did not cooperate with Qin Wen.