http://bugs.winehq.org/show_bug.cgi?id=16325
--- Comment #128 from Aric Stewart aric@codeweavers.com 2012-02-02 07:23:04 CST --- This is correct behavior.
It is generally up to the user or the packager to redirect SimSun to a correct local font.
If you have a local system font you want to use as a replacement you put it in
[Software\Microsoft\Windows NT\CurrentVersion\FontSubstitutes]
so for example if i want to use the Japanese Ume font "Ume UI Gothic" as my "MS UI Gothic" font i add
"MS UI Gothic" the value "Ume UI Gothic"
then when my font links get generated they automatically generate with Ume UI Gothic in them.
I am unsure what local system Chinese font you would be using but add it to your FontSubstitutes and see if the links are correctly generated using it.