I recall the pics I got it from were in a video of the newly delivered 056 variant corvettes for Algeria, though the possibility of splicing footage is there.
However Algeria has also previously bought C28A corvettes from China but those were a few years ago and would have used the older CIC type.
Are the pictures you posted confirmed of the new 056 variant corvettes or is it possible that they are the older C28As?
Surely the new Chinese CICs have stations with bolted-down seats.
Can't image how they can fight a real battle with high-speed turns and tilts while sitting on.....roller chairs.