提问于：
浏览数：
3419
# 问题背景和描述
windows10， texlive2019
命令行编译的报错信息：（虽然一路回车过去也能出pdf）
```
! LaTeX3 Error: Command '\songti' already defined!
For immediate help type H .
...
l.111 ...d \songti { } { \CJKfamily { zhsong } }
?
! LaTeX3 Error: Command '\heiti' already defined!
For immediate help type H .
...
l.112 ...nd \heiti { } { \CJKfamily { zhhei } }
?
! LaTeX3 Error: Command '\fangsong' already defined!
```
# MWE
```tex
\documentclass[hazy, pad, blue, 14pt]{elegantnote}
\usepackage{ctex}
\title{概率论的基本概念}
\author{lanling}
\version{1.0}
\date{}
\begin{document}
\maketitle
测试
\end{document}
```
# Github
https://github.com/ElegantLaTeX/ElegantNote/issues/14
我在那里也问了，不知何时回我......
