\documentclass[12pts,a4paper]{ctexart}

\usepackage{amsmath, amsthm, amssymb, appendix, bm, graphicx, hyperref, mathrsfs,geometry,titlesec,enumerate}

\ctexset{section/name=\S}
\numberwithin{equation}{section}
\numberwithin{figure}{section}


\newtheorem{theorem}{\large 定理}[section]
\newtheorem{definition}[theorem]{\large 定义}
\newtheorem{lemma}[theorem]{\large 引理}
\newtheorem{corollary}[theorem]{\large 推论}
\newtheorem{example}[theorem]{\large 例}
\newtheorem{proposition}[theorem]{\large 命题}
\newcommand{\solve}{{\noindent \heiti 解；}}
\newcommand{\prove}{{\noindent \heiti 证明：}}

\renewcommand{\abstractname}{\large 摘要\\}%变大字体
\renewcommand{\proofname}{\large\textbf{证明}}

\newcommand{\enabstractname}{Abstract}
\newenvironment{enabstract}{%
	\par\large
	\noindent\mbox{}\hfill{\bfseries \enabstractname}\hfill\mbox{}\par
	\vskip 2.5ex}{\par\vskip 2.5ex}  
%引入英文摘要环境

\geometry {a4paper,left=1.15in,right=1.15in,top=1in,bottom=1in}

\title{请输入标题}
\author{请输入作者}
\date{\Large \today}


\begin{document}
	\maketitle
	\thispagestyle{empty} 
	\newpage
	
    \tableofcontents
	\thispagestyle{empty} 
	\newpage
请在这里开始正文
\end{document}