ctex标题设置问题？

请教一下各位大佬，如何在ctex中设置标题中文字体为黑体，因为字体为times呀？我的设置如下：

...
\__xx_setmainfont:nn { Times~ New~ Roman    } { }
\__xx_setsansfont:nn { Arial                } { }
\__xx_setmonofont:nn { Courier~ New         } { }
\__xx_setCJKmainfont:n   { SimSun   }
\__xx_setCJKsansfont:n   { SimHei   }
\__xx_setCJKmonofont:n   { FangSong }
\__xx_set_cjk_font_kai:n { KaiTi    }
...
chapter =
      {
        format+={\sffamily \zihao{-2} \centering},
        number=\chinese{chapter},
        name={第,章},
        beforeskip  = 50 pt,
        afterskip   = 40 pt,
        fixskip     = true
      },
    section =
      {
        format+={\normalfont \sffamily \zihao{-3} \raggedright},
        beforeskip  = 3.5 ex plus 1.0 ex minus 0.2 ex,
        afterskip   = 2.7 ex plus 0.5 ex,
        fixskip     = true
      },
    subsection =
      {
        format      = \large \normalfont \sffamily \raggedright,
        beforeskip  = 3.25 ex plus 1.0 ex minus 0.2 ex,
        afterskip   = 2.5  ex plus 0.3 ex,
        fixskip     = true
      }

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