3804.md

```
% pandoc -t native
\titleformat{\chapter}[display]{\normalfont\large\bfseries}{第\thechapter{}章}{20pt}{\Huge}
^D
[ RawBlock
    (Format "tex")
    "\\titleformat{\\chapter}[display]{\\normalfont\\large\\bfseries}{\31532\\thechapter{}\31456}{20pt}{\\Huge}"
]
```