Reviving this thread with some new (and one older) picture:
It seems like that the PLA is slowly, but steadily disclosing this weapon. Finally.
That photo with the show actors wielding the ZH-05 was posted on the official PLA navy site (duh) and apparently commemorates the South Sea Fleet. That 'soldier' apparently is suppossed to represent a Naval Special Force member, not unlike those who are deployed in the Gulf of Aden. This would correlate with that one famous video clip from some years ago, claiming that this weapon is already in field testing and operation with the anti piracy patrol.
And still, I wonder why this weapon is never shown with its grenade magazine. And I also wonder whether the grenade part is indeed bolt-action or not, as that weapon sales chart clearly claimed that it is suppossed to be a "grenade machine gun", ie. likely semi-auto at least.