LaTeX.org

Here is an example

\documentclass{article}
\usepackage{fontspec}
\usepackage[BoldFont,SlantFont,CheckSingle,AutoFallBack=true]{xeCJK}
\usepackage{CJKnumb}
\setCJKmainfont[Vertical=RotatedGlyphs,BoldFont=MINGLIU.TTC]{HANAMINA.TTF}


\begin{document}

舉例

\end{document}

The text came out ...

The problem happened only for CJK (Chinese Japanese Korean) user because only they have vertical writing v.s. horizontal writing....for vertical writing we need to rotate the font and everything goes the same as horizontal writing.....the rotation is provided automatically by the font specification ...

I used to use xeCJK to write vetical Chinese
\usepackage{fontspec}
\usepackage[BoldFont,SlantFont,CheckSingle,AutoFallBack=true]{xeCJK}
\usepackage{CJKnumb}
with \setCJKfamilyfont{WSL}[Vertical=RotatedGlyphs,BoldFont=DFT_TX3.TTC]{WSL_Kai_TPS.ttf}

But after some update of the packages my Chinese ...