A LaTeX template for a paper with fixed baselineskip

fixed-baselineskip.tex

% A LaTeX template for a paper with fixed baselineskip
\documentclass[a4paper,zihao=-4]{ctexart}
\newlength{\fixbaselineskip}
\setlength{\fixbaselineskip}{1.104762cm} 
\usepackage[%
    left=2.5cm, right=2.5cm,
    top=4.7cm,
    textheight=21\fixbaselineskip,
    % bottom=1.6cm,
    heightrounded=false,
    showframe=false
]{geometry}
\usepackage{fancyhdr}
\usepackage{calc}
\usepackage{etoolbox}
\usepackage{everypage}
\usepackage{lastpage}
% \usepackage{showframe}
\usepackage{layout} % for command \layout and \layout*
\usepackage{enumitem} % for customizing list environments
\usepackage{tikz}
\usetikzlibrary{calc,arrows}

\usepackage{lipsum}
\usepackage{zhlipsum}

% fix the baselineskip
\apptocmd{\selectfont}{\setlength{\baselineskip}{\fixbaselineskip}}{}{}

\setlength{\topskip}{0.9cm} % move the text a little above

\newlength{\xtopmargin}
\setlength{\xtopmargin}{1in + \voffset + \topmargin + \headheight + \headsep}
\newlength{\xleftmargin}
\setlength{\xleftmargin}{1in + \hoffset + \oddsidemargin}
\newcommand{\plotbaselines}{%
  \begin{tikzpicture}[remember picture, overlay, shift=(current page.north west)]
    \foreach \i in {0,...,21} {
    \draw[red!40, thick]
      (\xleftmargin, - \xtopmargin - \i\fixbaselineskip) -- ++(\textwidth, 0);
    }
  \end{tikzpicture}
}

\ctexset{
    section = {
        format = \raggedright\bf,
        afterskip = 0pt,
        beforeskip = 0pt
    }
}

\parskip=0pt
\setlist[enumerate]{topsep=0pt, itemsep=0pt, parsep=0pt, partopsep=0pt}

\newcommand{\sign}{\vfill\hskip8cm \raisebox{\fixbaselineskip-\topskip}{签名：}}
\newcounter{namecount}
\newcommand{\currentnameid}{}
\newcommand{\currentname}{}
\newcommand{\setname}[1]{%
  \ifnum\value{namecount}>0
    \label{lastpage\currentnameid}%
    \newpage%
    \setcounter{page}{1}%
  \fi
  \stepcounter{namecount}
  \edef\currentnameid{\Alph{namecount}}%
  \def\currentname{#1}%
}
\AtEndDocument{\label{lastpage\currentnameid}}

\pagestyle{fancy}
% for fancyhdr warning
\setlength{\headheight}{14.45398pt} % Adjust head height to avoid fancyhdr warning
\addtolength{\topmargin}{-2.45398pt} % Compensate for the increased head height

\fancyhf{}
\fancyhead[R]{姓名：\currentname \quad\thepage/\pageref*{lastpage\currentnameid}}
\renewcommand{\headrulewidth}{0pt}

% show the base lines
\AddEverypageHook{\plotbaselines}

\begin{document}
% \layout{}
% (1)
\setname{赵钱孙}

% make blank pages
\zhlipsum[1-5][name=zhufu]
% \foreach \i in {1,...,2} {
%   \newpage
%   \mbox{}
% }
\sign

% (2)
\setname{周武郑}
\zhlipsum[1][name=zhufu]
\sign

\end{document}