My /etc/fonts/local.conf

local.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
  <alias>
    <family>monospace</family>
    <prefer>
      <family>Droid Sans Mono</family>
      <family>Noto Sans Mono CJK SC</family>
    </prefer>
  </alias>
  <alias>
    <family>sans-serif</family>
    <prefer>
      <family>Liberation Sans</family>
      <family>Noto Sans CJK SC</family>
    </prefer>
  </alias>
  <alias>
    <family>serif</family>
    <prefer>
      <family>Times New Roman</family>
      <family>Noto Serif CJK SC</family>
    </prefer>
  </alias>
</fontconfig>