is that just mock-up or bridge components for a real ship?
It's a full size mock-up...but more than a mock-up.
Sort of like the full size land-based mock-up of the Liaoning.
I believe they do all sorts of testing with these. Logistical tests...fabrication testing...damage control...they probably do analysis of movement throughout the ship. Things like that.
Then, as they come up with new designs for sensors and the like, they fabricate and test the fit on these mock ups.
Very useful tool for the PLAN.
The US has similar facilities where they even go so far as to install the entire sesnor suite and test them on land facilities.
The so-called "Cruiser in a corn field."
Inside they have a fully functional system.
...and they have expanded it in preparations for Flighjt III and the AMDR: