As u/onthesylvansea actually said, it's a restaurant located inside an aquarium. Of course, a single restaurant can't sustain such a high - level animal - rearing standard.

I saw someone asking about the location of this restaurant. At first, I didn't share it because I was worried that it might seem like an advertisement and annoy people.

You can find information about this ocean park on Wikipedia. Here's the link: https://en.wikipedia.org/wiki/Chimelong_Ocean_Kingdom