中文支持

问题：中文直接导出到 latex 和 pdf, 中文不显示

解决方法一

参考：Export Org file To pdf with Chinese Fonts - 知乎

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(with-eval-after-load 'ox-latex
  (add-to-list 'org-latex-classes
               '("ctexart" "\\documentclass[11pt]{ctexart}"
                 ("\\section{%s}" . "\\section*{%s}")
                 ("\\subsection{%s}" . "\\subsection*{%s}")
                 ("\\subsubsection{%s}" . "\\subsubsection*{%s}")
                 ("\\paragraph{%s}" . "\\paragraph*{%s}")
                 ("\\subparagraph{%s}" . "\\subparagraph*{%s}")))
  (setq org-latex-default-class "ctexart")
  (setq org-latex-compiler "xelatex"))

解决方法二

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(setq org-latex-compiler "xelatex")
#+LATEX_COMPILER: xelatex
#+LATEX_HEADER: \usepackage{xeCJK}

org-beamer 中文支持

参考：GitHub - wzpan/org-beamer-cn: {Deprecated} org-mode Simple Chinese Template f…

#+DESCRIPTION:
#+KEYWORDS:
#+LANGUAGE:  en
#+OPTIONS:   H:3 num:t toc:t \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
#+OPTIONS:   TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
#+INFOJS_OPT: view:nil toc:nil ltoc:t mouse:underline buttons:0 path:http://orgmode.org/org-info.js
#+EXPORT_SELECT_TAGS: export
#+EXPORT_EXCLUDE_TAGS: noexport
#+LINK_UP:
#+LINK_HOME:
#+XSLT:
#+startup: beamer
#+LATEX_CLASS: beamer
#+BEAMER_FRAME_LEVEL: 2
#+LaTeX_CLASS_OPTIONS: [xcolor=svgnames,bigger,presentation]
#+LATEX_HEADER:\usecolortheme[named=FireBrick]{structure}\setbeamercovered{transparent}\setbeamertemplate{caption}[numbered]\setbeamertemplate{blocks}[rounded][shadow=true] \usetheme{Darmstadt} \usepackage{tikz}\usepackage{xeCJK}\usepackage{amsmath}\setmainfont{Times New Roman}\setCJKmainfont[BoldFont={Adobe Heiti Std},ItalicFont={Adobe Kaiti Std}]{Adobe Heiti Std}\setCJKsansfont{Adobe Heiti Std}\setCJKmonofont{Adobe Kaiti Std}\usepackage{verbatim}\institute{beamerinstitute} \graphicspath{{figures/}} \definecolor{lstbgcolor}{rgb}{0.9,0.9,0.9} \usepackage{listings} \usepackage{fancyvrb}\usepackage{xcolor}\lstset{escapeinside=`',frameround=ftft,language=C,breaklines=true,keywordstyle=\color{blue!70},commentstyle=\color{red!50!green!50!blue!50},frame=shadowbox,backgroundcolor=\color{yellow!20},rulesepcolor=\color{red!20!green!20!blue!20}}

demo

\begin{equation} x^2 + 2x +1 = 3 \end{equation}

$x^2 + 2x +1 = 3$