when I try to incorporate some Chinese characters into an article complied by Xelatex, something goes wrong. The Chinese characters don't show up. My code is as below,
\documentclass[12pt]{article}
\usepackage{CJKutf8}
\usepackage{fontspec}
\begin{document}
\begin{CJK}{UTF8}{bkai}
\begin{titlepage}
\centering
{ 經濟系 \\
Department
\centering
\thispagestyle{empty}
\end{titlepage}
\end{CJK}
\end{document}
Thanks for any help!

Missing character: There is no 經 in font [lmroman17-regular]:mapping=tex-text;!. (It's a bug / design flaw in (Xe)TeX that this is only logged to the log file, and cannot be made an error: see Getting xetex to complain when a character is missing.) You need to specify a font for those characters. (Also btw you have a missing}) – ShreevatsaR Jun 23 '17 at 06:19CJKutf8package is not meant for XeLaTeX. Either you can remove\fontspecand compile withpdflatex, or remove theCJKutf8package and maybe usexeCJK. I can post an answer that seems to work for me, but as I can't read Chinese I'm not sure if it's right :-) Have you seen this question? – ShreevatsaR Jun 23 '17 at 06:41