\documentclass[en]{inkpaper}

\title{InkPaper:一个带有墨香的数学论文模板}
\author{Moyan Liang}
\date{\today}
\entitle{InkPaper:A paper template with ink perfume\\Package Documentation}
\begin{document}
\twocolumn[
    \maketitle
]
\section{Summary}
This template is designed for Mr.Loh and uses C\TeX to display Chinese characters.
(both cn and en can display Chinese characters.)
\section{Usage}
\begin{lstlisting}
    \documentclass[cn/en]{inkpaper}
\end{lstlisting}
Use
\begin{lstlisting}
    \twocolumn[
        \begin{onecolabstract}
            BlahBlahBlah...
        \end{onecolabstract}
    ]
\end{lstlisting}
for abstract environment.
\section{Theorems}
\begin{theorem}
    Exempli Gratia.
\end{theorem}
\end{document}