Emacs China 论坛不支持 Emacs Lisp 代码高亮，是因为所用的 highlight.js 不支持，大家写的 Emacs Lisp 代码有高亮的，一般都被识别成了 Clojure 或者 Common Lisp。（我个人觉得不好看，所以宁愿不要高亮）。但是用 EWW 浏览论坛的话，就能直接用 Emacs 做代码高亮了：
(defun chunyang-eww-tag-pre (dom)
"Add Emacs Lisp syntax highlighting.
Alternative to `shr-tag-pre'."
(let ((shr-folding-mode 'none)
(shr-current-font 'default))
(shr-ensure-newline)
(insert
(chunyang-eww-fontify-code
(with-temp-buffer
(shr-generic dom)
(buffer-string))
'emacs-lisp-mode))
(shr-ensure-newline)))
(defun chunyang-eww-fontify-code (string mode)
"Fontify CODE in major-mode MODE."
(with-temp-buffer
(insert string)
(delay-mode-hooks (funcall mode))
(if (fboundp 'font-lock-ensure)
(font-lock-ensure)
(with-no-warnings
(font-lock-fontify-buffer)))
(buffer-string)))
(setq shr-external-rendering-functions
'((pre . chunyang-eww-tag-pre)))
效果图（图中所用主题为 sanityinc-tomorrow-eighties）
我上面假设所有的代码块都是 Emacs Lisp，实际情况并非如此，大家可以用各种方法得到（或者猜 GitHub - andreasjansson/language-detection.el: Automatic programming language detection of code snippets, in Emacs Lisp ）编程语言，进而支持更多的编程语言。