不过，也有一些网站提供了名为 的独立字体文件。根据免费字体网站的描述，其中一款 CID Font F1 字体被描述为一款现代化的无衬线字体，适合网页和印刷品使用，具有设计现代、可读性高等特点。此外，还有 EU-F1、EU-F1X、EU-XF1 等变体，这些通常来自特定的字体开发商。需要注意的是，“CID 字体 F1-F7”和“PDF 占位符 CIDFont+F1 ”可能指向两个不同的概念，前者可能代表具体的字体产品，而后者则是一个通用系统符号。
If a document only uses five specific Chinese characters out of a 20,000-character font, the PDF creator will only embed those five characters to keep the file size small. This stripped-down, embedded collection is given a generic label like F1 or a random prefix like AAAAAA+F1 . 3. The Download Trap
They are internal document labels.
在 PDF 文件中，这些占位符的出现通常源于字体嵌入问题：如果在生成 PDF 时未嵌入字体，或者 PDF 阅读器解码失败，就容易出现 CIDFont+F1 这样的标识符。 CID font F1 F2 F3 F4 F5 F6 F7 Fonts Free Download
When the creator saved the PDF, they forgot to check the "Embed Fonts" option. The PDF is looking for the font on your local computer, but you do not have it installed.
Because they are placeholders, you cannot find CIDFont+F1.ttf on a font website.
Solution 1: Install the Free Adobe Acrobat Reader DC Font Packs The Download Trap They are internal document labels
: In many cases, these generic labels are actually masking common system fonts. For example: F1 often maps to Arial Bold or Times New Roman Bold . F2 often maps to Arial Regular or Times New Roman Regular .
: Sites offering "CIDFont F1-F7" for download are often fraudulent. Since no official font exists by that name, these downloads may contain malware or adware.
If the PDF contains Asian characters labeled as CID fonts, installing the official Adobe font packs will immediately resolve the display issues. Visit the official Adobe website. Because they are placeholders, you cannot find CIDFont+F1
import fitz # PyMuPDF
For users needing exact CID F1–F7 naming in software (e.g., PDF generation), a workaround is to: