\NeedsTeXFormat{LaTeX2e} \ProvidesClass{impebook_zh}[2026/09/29 v1.0.1 IMPE class for Chinese book] \makeatletter \DeclareOption*{\PassOptionsToClass{\CurrentOption}{book}} \ProcessOptions\relax \def\NextSystemUiTag{zh} \def\NextDefaultLayout{zh_book} \def\NextDefaultGlobalFonts{cmu,shanggu} \providecommand{\NextTitleAuthorFont}{\normalfont\large\itshape} \LoadClass{book} \RequirePackage{impe} \makeatother