This is a specific technical topic related to (often used for Asian languages like Chinese, Japanese, Korean) and their mapping to standard font names like F1 through F7 (common in older PDFs or software like Adobe Illustrator, CorelDRAW, or RIP software).
This is where most “cid font f1 missing” errors occur. Edit the Ghostscript cidfmap file. cid font f1 f2 f3 f4 f5 f6 f7 fonts better free download