Unlike traditional fonts that map characters to glyphs via names, CIDFonts map —numerical codes—directly to glyphs. This structure offers several advantages:
\newfontfamily\f1NotoSerifCJK-TC[NFSSFamily=f1] \newfontfamily\f2NotoSerifCJK-SC[NFSSFamily=f2] \newfontfamily\f3NotoSerifCJK-JP[NFSSFamily=f3] \newfontfamily\f4NotoSerifCJK-KR[NFSSFamily=f4] \newfontfamily\f5FandolSong[NFSSFamily=f5] \newfontfamily\f6AR PL UKai CN[NFSSFamily=f6] cidfont f1 f2 f3 f4 f5 f6
If you’d like, I can: