HE pdf viewer problem - SOLVED

When I use a browser to open a Chinese pdf file, the pdf looks fine.
However, when I compile it to HE .exe file. And the pdf looks bad (some characters have black blocks).
Please help!

Browser 1

HE pdf viewer 1

Browser 2

HE pdf viewer 2

Is it possible for you to send the problematic PDF files to our support team? Thus, they can see what is wrong in the PDF engine.

I ask vendor giving me another pdf file which was exported as a “standard form” pdf.
And the pdf file works fine.
So, no need for you to test it.

Thanks for the follow-up