How can I remove space betwwen two vbox minimal code
\documentclass{article}
\usepackage[left=.5cm,right=.5cm,top=.5cm,bottom=.5cm]{geometry}
\setlength\parindent{0pt}
\begin{document}
\setbox0=\vbox{\hsize=.5\linewidth Hi}
\setbox1=\vbox{\hsize=.5\linewidth everyone}
\setbox2=\hbox{\vrule\box0\vrule\box1\vrule}
\setbox3=\vbox{\hrule\box2\hrule}
\copy3\copy3
\end{document}