to see if the real font name is listed next to the CIDFont placeholder. Flatten Transparency : In Illustrator, instead of opening the PDF directly, it and use Object > Flatten Transparency
| Old Alias | Recommended Replacement (OpenType) | |-----------|-------------------------------------| | CIDFontF1 | NotoSansCJK-Regular.ttc | | CIDFontF2 | NotoSerifCJK-Regular.ttc | | CIDFontF3 | NotoSansMonoCJK-Regular.ttc | | CIDFontF4 | NotoSansCJK-Bold.ttc | | CIDFontF5 | NotoSerifCJK-Bold.ttc | | CIDFontF6 | NotoSansCJK-Symbols.ttc | cidfontf1 f2 f3 f4 f5 f6 updated