There is indeed an picatinny adapter for QBZ95, called RS 97 IIRC. Though I still have reservation of using it for optics. Since I've never use one of these adapter I'm asking loud out. Would it affects accuracy or requires more frequently re-calibration caused by adding one more connection part between scope and gun (have more connection points between parts for them to stray around)?
If the frame (mod kit) is secure enough, then the next question is the optics - mil-spec optics should be fine.
As for the "RS 97" - that's a airsoft (AEG) model gun manufactured quite some time back, and it could be accessorised with a picatinny adapter for scope mount, nevertheless it'd still make the sightline too high.
In my opinion, get rid of that handle and relocate the charging handle, either to give it a full length picatinny rail / keymod (this one may be better, open source, no IP issue to worry about) with standard issue optics, or integrated low-zoom optics like the AUG does. If you go with bullpup design, distance between front and rear iron sights is a problem that has no work-around, that's why the universal solution is to go standard optics.