Well, the photo looks like some kind of school trip to some place that looks like a museum. You can clearly see a bunch of high school (maybe college) kids who are wearing the same kind of t-shirts for some event...
So... I don’t think this is evidence for some top-secret military program.
I think it definitely does look like some kind of school trip or guided tour.
However, I'm not sure if it is necessarily a museum. The walls look rather spartan, and the green polished floor reminds me of a workshop. But I've been to a few shoddily arranged theme parks as well, so this photo could definitely have been taken inside a low cost "theme park" or "museum"... but it also looks like it could be part of a real lab or workshop.
And the cockpit simulators unfortunately don't help us much, because they look like they could be actual proper simulators for a lab (we've seen simulators with far less "professional" set ups than this), or they could be very complex video games/toys.
Same goes for the aircraft nose in the background -- it might be a scale mock up of a real aircraft that was being researched, or it might just be another poorly implemented part of the "theme park".
So imo it's pretty hard to tell if this photo might actually be legit and taken at part of SAC or not.
It also is not unprecedented for Chinese students to be given exposure to part of an aviation complex, especially if it's a declassified low risk area -- I still remember the photo of that row of Chinese kids sitting in front of a newly built Y-8GX6 at Shaanxi.
It could swing either way, without any additional information at hand.