If I remember correctly the Chinese tried to reverse engineer a Russian engine but it failed miserably. They then had to install Russian engines in the J 20
So the Chinese are not the grand bastions of engineering and manufacturing prowess that the entire establishment keeps telling us? /s
The Russian engines are in the J-10 (the J-15 is the naval version, I think). The Chinese put their W-8? engines in the J-20. They have no luck on turbine manufacture; perhaps GE will help them out.
Was unable to find all the sources for the above - just ran out of time.