https://www.statista.com/chart/2280/the-global-fish-farming-...
China's being smart about it too - they are farming fish which are ubiquitous and easy to farm (Carp and Tilapia):
https://thechinaguys.com/aquaculture-in-china/
China could do a much better job at regulating their fishing industry though...
In the West we eat Tilapia, but we probably should learn to eat Carp. Unfortunately as a family of fish, it gets a bad rap for a few reasons (Americans don't like bones, Carp has a low-class association, Carp can be "muddy" if not raised and prepared right).