\documentclass[mode = beamer]{westlakethesis}

\westlakeset {
  title  = Westlake Beamer Theme/beamerthemeWestlake,
  author = {Mingyu Xia, Department of Physics}/Mingyu Xia,
  date   = \texorpdfstring
    {\texttt{Released \WUFileDate}}{Released \WUFileDate}
}

\begin{document}

\maketitle

\section{Introduction}

\begin{frame}

\end{frame}

\end{document}