How to create a node with a vertical Chinese text

I can't read or write Chinese, then I don't know if this is the right way to write it.

I just specified a width to the text text width=1.5em so that each character is displayed one under the other.

documentclass[tikz]{standalone}
usepackage[UTF8]{ctex}

begin{document}

begin{tikzpicture}
node[draw,inner sep=2pt,text width=1.5em] at (0,0) {文章内容。};
end{tikzpicture}

end{document}

Please use XeLaTeX or LuaLaTeX!

documentclass{article}
usepackage{tikz}
usepackage{fontspec}
usepackage{expl3}
setmainfont{FandolSong-Regular.otf}

begin{document}

ExplSyntaxOn

cs_new:Npn __map_function #1 {
    tl_put_right:Nn l_tmpa_tl {noindent #1 par}
}

cs_new:Npn __map_function_centering #1 {
    tl_put_right:Nn l_tmpa_tl {centering #1 par}
}

newcommand{verticaltext}[1]{
    str_set:Nn l_tmpa_str {#1}
    tl_clear:N l_tmpa_tl
    str_map_function:NN l_tmpa_str __map_function
    tl_use:N l_tmpa_tl
}

newcommand{verticalcentertext}[1]{
    str_set:Nn l_tmpa_str {#1}
    tl_clear:N l_tmpa_tl
    str_map_function:NN l_tmpa_str __map_function_centering
    tl_use:N l_tmpa_tl
}

ExplSyntaxOff

begin{tikzpicture}
node[draw,inner sep=2pt,text width=7mm] at (0,0) {verticaltext{文章内容。}};
node[draw,inner sep=2pt,text width=7mm] at (1,0) {verticaltext{abcde}};
node[draw,inner sep=2pt,text width=7mm] at (2,0) {verticalcentertext{文章内容。}};
node[draw,inner sep=2pt,text width=7mm] at (3,0) {verticalcentertext{abcde}};
end{tikzpicture}


end{document} 

A XeLaTeX approach, note that this is a pseudo vertical typesetting.

documentclass[tikz]{standalone}
usepackage[UTF8]{ctex}

tikzset{
  pseudo vertical/.style={
    % 1ccwd is the width of one Chinese character, see user manual of ctex pkg
    text width=1ccwd,
    % reduce line spacing and allow linebreak before Chinese period punct (。)
    % c.f. user manual of xeCJK pkg
    font=linespread{1}selectfontxeCJKDeclareCharClass{CJK}{`。}
  }
}

begin{document}
begin{tikzpicture}
  node[draw, inner sep=2pt, pseudo vertical] at (0,0) {文章内容。};
end{tikzpicture}
end{document}

You can use system fonts, like the Noto series. That way you are not tied to particular font packages for specific systems.

This variation of an answer uses tikz positioning, so useful for short texts.

Compile with xelatexlualatex.

MWE

documentclass[12pt]{article}
usepackage{tikz}
usetikzlibrary{positioning}
usepackage{xcolor}

usepackage{fontspec}
setmainfont{Noto Serif}
newfontfacezhfont[Scale=2.5,Colour=blue]{Noto Serif SC}
usepackage{lipsum}

begin{document}
 marginpar{
begin{tikzpicture}[inner sep=3pt,node distance=0mm,font={zhfont}]
  node (a) {文};
  node (b) [below=of a] {章};
  node (c) [below=of b] {内};
  node (d) [below=of c] {容};
  node (e) [below=of d] {。};
end{tikzpicture}} lipsum[2]lipsum[2]
end{document}

---

Addendum:

Alternatively, question Vertical Chinese text with XeTeX provides a 'rotate the glyphs' solution for fonts with the feature. The minipage box they are in is also rotated, so the characters come out vertical.

This could be adapted to tikz.

MWE

documentclass{article}

usepackage{graphicx} % for rotatebox

usepackage{xeCJK}
newfontlanguage{Chinese}{CHN}
setCJKmainfont{Noto Serif CJK SC}
setCJKfamilyfont{songvert}[RawFeature={vertical;+vert},Script=CJK,Language=Chinese,Vertical=RotatedGlyphs]{Noto Serif SC}
setmainfont{Noto Serif}

newcommand*CJKmovesymbol[1]{raise.35emhbox{#1}}
newcommand*CJKmove{punctstyle{plain}% do not modify the spacing between punctuations
  letCJKsymbolCJKmovesymbol
  letCJKpunctsymbolCJKsymbol}

newcommandsampletext{『文章内容』。}

begin{document}

sampletext  This is some sample text.
begin{center}
rotatebox{-90}{fbox{begin{minipage}{10em}
CJKfamily{songvert}CJKmove
sampletext 
sampletext 
sampletext 
sampletext 
end{minipage}}}
end{center}
sampletext  This is some sample text.

end{document}

---

A tikz node inline, containing rotated glyphs and their box:

MWE

documentclass{article}
usepackage{xcolor}

usepackage{graphicx} % for rotatebox
usepackage{tikz}

usepackage{xeCJK}
newfontlanguage{Chinese}{CHN}
setCJKmainfont{Noto Serif CJK SC}
setCJKfamilyfont{songvert}[RawFeature={vertical;+vert},Script=CJK,Language=Chinese,Vertical=RotatedGlyphs]{Noto Serif SC}
setmainfont{Noto Serif}

newcommand*CJKmovesymbol[1]{raise.35emhbox{#1}}
newcommand*CJKmove{punctstyle{plain}% do not modify the spacing between punctuations
  letCJKsymbolCJKmovesymbol
  letCJKpunctsymbolCJKsymbol}

newcommandsampletext{『文章内容』。}

begin{document}

sampletext  This is some sample text.
tikz node {rotatebox{-90}{colorbox{red!4}{
CJKfamily{songvert}CJKmove
sampletext}}};
sampletext  This is some sample text.

end{document}