Fixed Simplified Chinese Display

Create/edit /etc/fonts/conf.d/64-language-selector-prefer.conf (global) or ~/.fonts.conf (only effective for the user):

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
  <alias>
    <family>sans-serif</family>
    <prefer>
      <family>Noto Sans CJK SC</family>
      <family>Noto Sans CJK TC</family>
      <family>Noto Sans CJK JP</family>
    </prefer>
  </alias>
  <alias>
    <family>monospace</family>
    <prefer>
      <family>Noto Sans Mono CJK SC</family>
      <family>Noto Sans Mono CJK TC</family>
      <family>Noto Sans Mono CJK JP</family>
    </prefer>
  </alias>
</fontconfig>

Reference

https://wiki.archlinux.org/title/Localization/Simplified_Chinese#Fixed_Simplified_Chinese_display_as_a_variant_(Japanese)_glyph