a.tex

\documentclass{ctexart}
\usepackage{graphicx}
\usepackage{caption}
\begin{document}
\begin{figure*}[h]
    \begin{minipage}[t]{0.45\linewidth}
        \centering
        \includegraphics[width=1.75\linewidth]{BytesDF.png}
        %\caption[loftitle]{blabla}
    \end{minipage}
    \hfill
    \begin{minipage}[t]{0.45\linewidth}
        \centering
        \includegraphics[width=1.75\linewidth]{BytesDF.png}
        %\caption[loftitle]{kacakaca}
    \end{minipage}
    \caption*{kacakaca}
\end{figure*}
\end{document}