\documentclass[twocolumn]{article}
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{url}
\usepackage{xeCJK}
\setmainfont{Helvetica}
\setCJKmainfont{YuMincho}
\title{report}
\author{himkt}
\date{\today}

\begin{document}
\maketitle
\section{introduction}
hello, world\cite{greenwade93}.

\bibliographystyle{plain}
\bibliography{reference}
\end{document}

\documentclass[twocolumn]{article}
\usepackage[top=10truemm,bottom=10truemm,left=10truemm,right=10truemm]{geometry}
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{url}
\usepackage{xeCJK}
\setmainfont{Helvetica}
\setCJKmainfont{YuMincho}
\title{report}
\author{himkt}
\date{\today}

\begin{document}
\maketitle
\section{introduction}
hello, world\cite{greenwade93}.

\bibliographystyle{plain}
\bibliography{reference}
\end{document}

Update the xetex margin config
Update the xetex margin config
