欢迎各位老师批评指正！

\documentclass{beamer}\usepackage{ctex}\usepackage{tikz}\usetikzlibrary{fadings}\begin{document}\begin{frame}\begin{center}\begin{tikzpicture}\node[above,xscale=1.2,yscale=1.4]{\Huge\bfseries 欢迎各位老师批评指正!};\node[xscale=1.2,above,yscale=-1.4,scope fading=south,opacity=0.2]{\Huge\bfseries 欢迎各位老师批评指正!};\end{tikzpicture}    \end{center}    \end{frame}\end{document}

效果图