\documentclass[UTF8]{beamer}
\input{header.tex}
%-------------title here--------------------
\title{ECNU Beamer Presentation}
\subtitle{Using \LaTeX\ to prepare slides}
\course{}
\author{Author}
\IDnumber{}
%--------------begin document--------------------
\begin{document}
\maketitle
\begin{frame}
This template is based on \hrefcol{https://www.overleaf.com/latex/templates/sapienza-presentation/yyksmrskffhk}{Sapienza Presentation} from \hrefcol{mailto:andrea@gasparini.cloud}{Andrea Gasparini}
\vspace{\baselineskip}
In the following you find a brief introduction on how to use the beamer package to prepare slides, based on the one written by \hrefcol{mailto:andrea@gasparini.cloud}{Andrea Gasparini} for \hrefcol{https://www.overleaf.com/latex/templates/sapienza-presentation/yyksmrskffhk}{Sapienza Presentation}
\end{frame}
\input{contents/Introduction.tex}
\input{contents/Personalization.tex}
\input{contents/Summary.tex}
\backmatter
\end{document}