A: The PDF contains a hidden CJK character (like a bullet point or dash that Unicode maps to a CJK range). Use a PDF cleaner like qpdf to remove the unused font reference.
CID (Chinese, Japanese, and Korean) fonts are a series of typefaces designed specifically for Asian languages. The CID font family was created to provide a high-quality, versatile font solution for various applications, including digital media, publishing, and advertising. The font family consists of four main variants: F1, F2, F3, and F4, each with its distinct features and use cases. cid font f1 f2 f3 f4 free download link
Change the font manually to common system standard families like or Times New Roman . A: The PDF contains a hidden CJK character
Because these names are essentially "aliases" for parts of other fonts used in a specific file, there is no single "CID Font F1" file that exists for general download. What These Labels Actually Mean The CID font family was created to provide