The J-15 looks like it's a standard STOBAR J-15 given the pitot tube and radome, so if this is real this is unlikely to have been taken on CV-18.
That said there is a fair bit about it that looks suspicious, those red and yellow elevated boundary markers wouldn't make spotting and maneuvering in the hangar very easy at all and I've never seen it on a real carrier before.
I'm also unsure if either aircraft are real to begin with, they have an odd sheen to them, and I wonder if they are just mockups or models.
Without additional context I'm tempted to say that this might be a picture from a theme park or something, but I'm not sure which theme park would have that kind of setup. From memory the former Kiev doesn't look like this in the hangar and Minsk is no longer active as a theme park.
So without better pictures or additional context I wouldn't be too excited, and I also don't think openly posting it on twitter asking for guidance would be very constructive either lol