tex tab example

documentclass[12pt]{book}
usepackage{xeCJK}
usepackage{fontspec}

ewfontfamilysourcehansans{Source Han Sans CN}

ewfontfamilysourcehanserif{Source Han Serif CN}
setCJKmainfont{Source Han Serif CN}
setCJKsansfont{Source Han Sans CN}
usepackage{geometry}
geometry {  paperheight=297mm,paperwidth=210mm,left=9mm, right=9mm, top=7mm, bottom=7mm}
usepackage[table]{xcolor}
usepackage{supertabular}
usepackage{tabularx}
usepackage{booktabs}

ewcolumntype{L}[2]{>{sf columncolor{#1} 
aggedright arraybackslash} m{#2}}
  
egin{document}

egin{center}
    	ablefirsthead{
        hline
        multicolumn{1}{|c}{Item} &
        multicolumn{1}{|c}{1} &
        multicolumn{1}{|c}{2} &
        multicolumn{1}{|c}{3} \
        hline
    }

    	ablehead{
        hline
        multicolumn{4}{|l|}{smallsl continued from previous page}\
        hline
        multicolumn{1}{|c}{Item} &
        multicolumn{1}{|c}{1} &
        multicolumn{1}{|c}{2} &
        multicolumn{1}{|c}{3} \
        hline
    }

    	abletail{
        hline
        multicolumn{4}{|r|}{smallsl continued on next page}\
        hline
    }

    	ablelasttail{hline}

    ottomcaption{short summary}

    
enewcommandarraystretch{2}

    egin{supertabular}{L{white!30}{1.5cm}| L{gray!20}{5cm}| L{blue!20}{5cm}| L{red!20}{5cm}}
      1 & 1 & 2  & 3 \
    end{supertabular}
end{center}
  
end{document}