In the Wei Dynasty (Three States Period), O Shuku (Wang Su) rebutted Jo Gen and created annotations for almost all classics, and most of these annotations for classics were assigned as gakkan.
魏(三国)に入ると、王粛（おうしゅく）が鄭玄を反駁してほぼ全経に注を作り、その経注のほとんどが魏の学官に立てられた。