Untitled

\documentclass{article}
\usepackage{ctex}
\usepackage{zhlipsum}

\makeatletter
\newcommand\rjustified{%
  \let\\\@fillcr
  \leftskip\z@\@plus 1fil
  \rightskip\z@\@plus -1fil
  \parfillskip\z@\@plus 1fil\relax
}
\protected\def\@fillcr{%
  \let \reserved@e \relax
  \let \reserved@f \relax
  \@ifstar{\let \reserved@e \vadjust \let \reserved@f \nobreak
    \@xnewlinefill}%
  \@xnewlinefill}
\def\@xnewlinefill{\@ifnextchar[% ] bracket matching
  \@newlinefill{\@gnewlinefill\relax}}
\def\@newlinefill[#1]{\let \reserved@e \vadjust
  \@gnewlinefill {\vskip #1}}
\def\@gnewlinefill #1{%
  \ifvmode
    \@nolnerr
  \else
    \unskip \reserved@e {\reserved@f#1}\nobreak \hfill \break
  \fi}
\makeatother


\begin{document}

\rjustified{\zhlipsum[2]}

\end{document}