Huitong's page mentions a PESA of possible Russian origin. But we haven't heard any order of orders or sales yet... So could a potential sale have happened? Or did the Chinese reverse engineer some of the PESA's on their MK2's.I look at this pic I'm pretty certain the radar has to be working on ESA principle now. Also, the pod under the wings looks like some new ECM, and there might be a new RWR near the engine duct.
That or your observation of an AESA is possible I think.