Not so long ago tracking ChinaPost worked poorly (or not worked at all, often because it is)
I found a project (with clearly Chinese roots) www.17track.net/IndexEn.html
which is normally trical Chinese mail (I do not know how, perhaps they have a different access to citipati)
Supports many email services (including "our")
The interface is of course evil, but I think it may be useful if the official tracking citipost is...