Common Mistakes and Confusions #

\vskip 5cm %Cannot use \vskip{5cm}

\newCJKfontfamily\qingsong{FZQKBYSJW--GB1-0}%Define a new name for the font family
\setCJKfamilyfont{qingsong}{FZQKBYSJW--GB1-0}%Set the CJK font family
Note the difference in meaning between the two, one is fontfamily and the other is familyfont.

\newCJKfontfamily\qingsong[ItalicFont = FZQKBYSJW--GB1-0,BoldFont = FZQKBYSJW--GB1-0]{FZQKBYSJW--GB1-0}
\newCJKfontfamily\fs[ItalicFont = STFangsong,BoldFont = STFangsong]{STFangsong}
Try to define fonts with regular, italic, bold, etc. as much as possible, otherwise you might not be able to find these fonts and get a warning.

%Make sure to set geometry before setting headers and footers, pay attention to this
\usepackage[]{geometry}
\usepackage{fancyhdr}
\pagestyle{fancy}

\usepackage[heading = true]{ctex}
%Be careful not to force line breaks in ctexset settings (natural line breaks are allowed), otherwise it will not compile
\ctexset{section = {name = {第,回},titleformat = {\mysection}}}
\newcommand{\mysection}[1]{\Large #1}

\overbrace{Bracket Content}^{Annotation Content}
%Note that you must use the ^ or _ symbol, otherwise there will be an error

%When using the align or gather environment, be careful not to have empty lines inside, and do not add \\ after the last item
\begin{align}
First Item\\
Second Item\\
Third Item (without \\)
\end{align}