If you are a graphic designer, a print professional, or a software developer, you may have encountered files labeled as "CID Font F1," "F2," "F3," or "F4" while troubleshooting PDF errors or digging through system font folders.
You don't need a specific CID file. You need a CJK font. Download one of these standard fonts for free: Cid Font F1 F2 F3 F4 Free Download
16-bit Support: Unlike standard fonts that only handle 256 characters, CID fonts can support up to 65,535 separate characters, making them essential for Asian languages. Everything You Need to Know About CID Fonts
to see the full list of fonts. If you can identify the visual style, you can manually replace the text block with a similar standard font like Are you trying to Download one of these standard fonts for free: