They might design an airframe with basically no vertical tail surfaces to maximize stealth and use TVC nozzles for maneuvering.
And the initial engine could be WS-15.
The airframe could also have some equivalent of DAS sensors in case J-20 does not have it yet.
And the initial engine could be WS-15.
The airframe could also have some equivalent of DAS sensors in case J-20 does not have it yet.