/home/kelvin/.config/font-manager/local.conf

local.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
	<match target="pattern">
		<test name="family" qual="any">
			<string>AR PL ShanHeiSun Uni</string>
			<string>AR PL New Sung</string>
		</test>
		<test compare="more_eq" name="pixelsize" >
			<double>12</double>
		</test>
		<test compare="less_eq" name="pixelsize" >
			<double>16</double>
		</test>
		<edit name="family" mode="prepend" binding="strong">
			<string>WenQuanYi Bitmap Song</string>
		</edit>
    </match>

    <!-- 非衬线字体 ( Sans Serif )  -->
	<match target="pattern">
		<test qual="any" name="family">
			<string>sans-serif</string>
		</test>
		<edit name="family" mode="prepend" binding="strong">
			<string>Lihei Pro</string>
		</edit>
    </match>
    <!-- 衬线字体 ( Serif ) -->
	<match target="pattern">
		<test qual="any" name="family">
			<string>serif</string>
		</test>
		<edit name="family" mode="prepend" binding="strong">
			<string>Lihei Pro</string>
		</edit>
    </match>

    <!--  等宽字体 ( Monospace )  -->
    <match target="pattern">
		<test qual="any" name="family">
			<string>monospace</string>
		</test>
        <edit name="family" mode="prepend" binding="strong">
            <!-- 其他大部分等寬字體CJK字符都存在鋸齒 -->
            <string>Ubuntu Mono</string>
		</edit>
		<edit name="lcdfilter" mode="assign"><const>lcdlegacy</const></edit>
    </match>

</fontconfig>