the book that can't read

okular can't display book correcly, just wrong words,It looks like there are missing fonts (which are not embedded in the document).

I use mupdf and can read it correcly, and I notice there is print as below:

nisy@nisy-ubuntu:/media/nisy/sda1_WinXP/_Technology/98_my_project/_27_改进开源软件/乱码问题$ mupdf ./1_\[雅舍菁华\].梁秋实.文字版.PDF 
warning: workaround for S22PDF lying about chinese font encodings
warning: ... repeated 2 times ...
warning: workaround for S22PDF lying about chinese font encodings
warning: ... repeated 2 times ...


so I guess mupdf had workaround to avoid font issue, so I checked in mupdf code,find its code should be:

	pdf_load_font
		|__pdf_load_simple_font 
				|__ pdf_load_simple_font_by_name
					|__ 				fz_warn(ctx, "workaround for S22PDF lying about chinese font encodings");


Because okular also have font mechanism for pdf backend, so can okular consider to check mupdf 's mechanism, and merge mupdf 's method to avoid this issue? Thanks.

Reproducible: Always