I don't really understand why this engine discussion is taking so much "place" on here or on the other thread for that matter. The main point as of today is that whatever engine J-20A has today is still way above any level of upgraded J-10 / J-11 / J-15 / J-16 as a "total package".
Other main point is to get every part of the infrastructure ready for a massive production when the newer engine is ready - however, one should still start buildning J-20A with present engine, because as a "total package aircraft", it's still better and above what most countries have.
No one is a superpower because they have 50 or 100 stealth fighters. They can become superpower when you have 1500 - 2000 of those.
The same applies for submarines, destroyers and so on. One is not a superpower because a given country has only a handful of this and that.
So mass production and resources along with infrastructury and economy is as important as this next generation engine that will power J-20 in the future.
The most significant thing is China is progressively getting the Know-How for developing big fighter jet engines, on which the U.S. and Russia are the only two other players at the moment.