The learning of Keisho in former Han was specially restricted to only one classic, respecting the school, and following the rules and interpretations of the school told by the teacher, word for word (A study on Confucian Classics where the literature is divided into phrases, chapters and sections and their meanings or abstracts are lectured and explained).
前漢の経学は一経専門であり、流派を重んじて、師から伝えられる家法を守り、一字一句も変更することがなかった（章句の学）。