Chinese input

on Windows

\usepackage{CJK}

\begin{CJK}{GB}{gbsn} % Use default fonts from CJK (see below)

大漠孤烟直

\end{CJK}

On Mac

\usepackage{CJK}

\begin{CJK}{UTF8}{gbsn} % Use default fonts from CJK (see below)

长河落日圆

\end{CJK}

I don't know whether it works. I don't know why it works.