main.tex

\documentclass[UTF8, answers]{BHCexam}
% \documentclass[UTF8]{BHCexam}
% \documentclass[]{ctexart}
% \usepackage{newtxmath}
\usepackage{physics}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage[normalem]{ulem}
% \usepackage{CJKulem}
\usepackage[]{xeCJK}
% \setCJKmainfont{SimSun}
\usepackage{xeCJKfntef}
% \usepackage{soul}
% \usepackage{lmodern}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\PassOptionsToPackage{a4paper}{geometry}
\usepackage[fontsize=8pt]{fontsize}
\usepackage{siunitx}
\def\qt{\question}
\geometry{a5paper}
\begin{document}
\include{./src/exam1}
\include{./src/exam2}
\include{./src/exam3}
\include{./src/exam4}
\include{./src/exam5}
\include{./src/exam6}
\include{./src/exam7}
\include{./src/exam8}
\include{./src/exam9}
\include{./src/exam10}
\include{./src/exam11}
\include{./src/exam12}
\include{./src/exam13}
\end{document}