my fonts.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<!--
   .fonts.conf used by WU Jun <#{['.net', 'lihdd', '@', 'quark'].reverse.join}>
   2010-2012 Some rights reserved.
-->
<fontconfig>
    <rejectfont>
        <!-- Reject ugly XServer fonts -->
        <pattern>
            <patelt name="family">
                <string>Fixed</string>
            </patelt>
        </pattern>

        <!-- Reject SimSun -->
        <pattern>
            <patelt name="family">
                <!-- "NSimSun" or "新宋体" can still be used -->
                <string>SimSun</string>
            </patelt>
        </pattern>

        <!-- "Arial Unicode MS" will take 1st place of fc-match, disable it -->
        <pattern>
            <patelt name="family">
                <string>Arial Unicode MS</string>
            </patelt>
        </pattern>
    </rejectfont>

    <!-- Hinting, Subpixel rendering, LCD filter, dpi -->
    <match target="font">
        <edit mode="assign" name="antialias" >
            <bool>true</bool>
        </edit>
        <edit mode="assign" name="hinting" >
            <bool>true</bool>
        </edit>
        <edit mode="assign" name="hintstyle" >
            <const>hintslight</const>
        </edit>
        <edit name="rgba" mode="assign"><const>rgb</const></edit>
        <!-- seems only cario-lcd, *-lcd use this setting -->
        <edit mode="assign" name="lcdfilter">
            <const>lcddefault</const>
        </edit>
        <edit mode="assign" name="dpi">
            <double>96</double>
        </edit>
    </match>

    <!-- Set sans-serif as fallback family -->
    <match target="pattern">
        <test qual="all" name="family" compare="not_eq">
            <string>sans-serif</string>
        </test>
        <test qual="all" name="family" compare="not_eq">
            <string>serif</string>
        </test>
        <test qual="all" name="family" compare="not_eq">
            <string>monospace</string>
        </test>
        <edit name="family" mode="append_last">
            <string>sans-serif</string>
        </edit>
    </match>

    <!-- Force all Chinese, Japanese, Thai to use Droid Sans -->
    <!--
    <match target="pattern">
        <test qual="any" compare="eq" name="lang" target="font">
            <string>zh-cn</string>
            <string>zh-tw</string>
            <string>zh-hk</string>
            <string>zh-sg</string>
            <string>zh</string>
        </test>
        <edit name="family" mode="append" target="font" binding="strong">
            <string>Droid Sans Fallback</string>
        </edit>
    </match>
    <match target="pattern">
        <test qual="any" compare="eq" name="lang" target="font">
            <string>ja</string>
        </test>
        <edit name="family" mode="append" target="font" binding="strong">
            <string>Droid Sans Japanese</string>
        </edit>
    </match>
    <match target="pattern">
        <test qual="any" compare="eq" name="lang" target="font">
            <string>th</string>
        </test>
        <edit name="family" mode="append" target="font" binding="strong">
            <string>Droid Sans Thai</string>
        </edit>
    </match>
    -->

    <!-- Fallback to use Droid Sans, globally -->
    <match target="pattern">
        <edit name="family" mode="append" target="font" binding="weak">
            <string>Droid Sans Fallback</string>
            <string>Droid Sans Japanese</string>
            <string>Droid Sans Thai</string>
        </edit>
    </match>

    <!-- Terminus 9 Bold fix -->
    <match target="font">
        <test name="family" compare="eq" qual="any">
            <string>Terminus</string>
        </test>
        <edit mode="assign" name="weight" >
            <const>thin</const>
        </edit>
    </match>

    <!-- Set NSimSun as Terminus fallback -->
    <match target="pattern">
        <test name="family" compare="eq" qual="any">
            <string>Terminus</string>
        </test>
        <edit name="family" mode="append">
            <string>NSimSun</string>
        </edit>
    </match>
</fontconfig>