[Bug]: Missing Chinese character and part of number;

[atlenovo]

Attach (recommended) or Link to PDF file

011028 (5).pdf

Web browser and its version

Microsoft Edge 131.0.2903.51

Operating system and its version

Microsoft Window 11 23H2 22631.4460

PDF.js version

PDF.js: 4.3.8 [c419c83]

Is the bug present in the latest PDF.js version?

Yes

Is a browser extension

No

Steps to reproduce the problem

open pdf file in issue above with pdfjs

What is the expected behavior?

What went wrong?

its a file with font subset embedded, shown as missing all Chinese character and part of number character

Link to a viewer

No response

Additional context

No response

[kphuanghk]

It seems the sample PDF does not properly embed required Chinese glyphs, some viewers may work, but technically it does not embed the required glyphs, I think pdf.js just reflects the truth.

You can test with Ghostscript command

gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4  -dNOPAUSE -dQUIET -dBATCH -sOutputFile=improvedchinese.pdf 011028.pdf

Below output hints the missing glyphs

GPL Ghostscript 9.26: Missing glyph CID=28007, glyph=6d67 in the font AAAAAA+SourceHanSerifCN-Bold . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=25812, glyph=64d4 in the font AAAAAA+SourceHanSerifCN-Bold . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=10237, glyph=27fd in the font AAAAAA+SourceHanSerifCN-Bold . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=14726, glyph=3986 in the font AAAAAA+SourceHanSerifCN-Bold . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=14726, glyph=3986 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=20328, glyph=4f68 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=10072, glyph=2758 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=13962, glyph=368a in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=14049, glyph=36e1 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=28007, glyph=6d67 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=25812, glyph=64d4 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=10981, glyph=2ae5 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=10237, glyph=27fd in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=15413, glyph=3c35 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=25791, glyph=64bf in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=15364, glyph=3c04 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=30523, glyph=773b in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=30524, glyph=773c in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=13951, glyph=367f in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=14645, glyph=3935 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=24476, glyph=5f9c in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=24466, glyph=5f92 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=30528, glyph=7740 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=30530, glyph=7742 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=30520, glyph=7738 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.
GPL Ghostscript 9.26: Missing glyph CID=14288, glyph=37d0 in the font BAAAAA+SourceHanSerifCN-Regular . The output PDF may fail with some viewers.

Hope this helps.

[calixteman]

From Acrobat on WIndows 11:

and it's fine in Chrome.