\usepackage{xeCJK}
\setCJKmainfont[AutoFakeBold=3,AutoFakeSlant=.4]{TW-Kai}

NotoSerifCJKtc

\usepackage{fontspec}

\setmainfont{Noto Serif CJK TC}

\setsansfont{Noto Sans CJK TC}

%% fontspec package requires either XeLaTeX or LuaLaTeX
\usepackage{fontspec}
\setmainfont{Noto Serif CJK TC}
\setsansfont{Noto Sans CJK TC}
\newfontfamily\wqyfamily{WenQuanYi Micro Hei}
\newfontfamily\ukai{AR PL UKai TW}
\newfontfamily\uming{AR PL UMing TW}