Er, the Chinese solved the problem with the WS-10 several years back.
The WS-10H has been pulled from the J-15 due to lack of performance and reliability issues just last year.
Their carrier jets fly infrequently and with 1/2 designed payload.
Compare that to the F-18 engine the GE F414.
The WS-10 is based on the Russian AL31, which for Russian engines was considered reliable. It’s late 80s tech.
And the Chinese can’t even get that right.