Edit file File name : 99-language-selector-zh.conf Content :<?xml version="1.0"?> <!DOCTYPE fontconfig SYSTEM "fonts.dtd"> <fontconfig> <match target="font" > <test name="family" compare="contains" > <string>Song</string> </test> <!-- check to see if the font is just regular --> <test name="weight" compare="less_eq"> <int>100</int> </test> <test compare="more_eq" target="pattern" name="weight" > <int>180</int> </test> <edit mode="assign" name="embolden" > <bool>true</bool> </edit> </match> <match target="font" > <test name="family" compare="contains" > <string>Sun</string> </test> <!-- check to see if the font is just regular --> <test name="weight" compare="less_eq"> <int>100</int> </test> <test compare="more_eq" target="pattern" name="weight" > <int>180</int> </test> <edit mode="assign" name="embolden" > <bool>true</bool> </edit> </match> <match target="font" > <test name="family" compare="contains" > <string>Kai</string> </test> <!-- check to see if the font is just regular --> <test name="weight" compare="less_eq"> <int>100</int> </test> <test compare="more_eq" target="pattern" name="weight" > <int>180</int> </test> <edit mode="assign" name="embolden" > <bool>true</bool> </edit> </match> <match target="font" > <test name="family" compare="contains" > <string>Ming</string> </test> <!-- check to see if the font is just regular --> <test name="weight" compare="less_eq"> <int>100</int> </test> <test compare="more_eq" target="pattern" name="weight" > <int>180</int> </test> <edit mode="assign" name="embolden" > <bool>true</bool> </edit> </match> </fontconfig> Save