An article on 14th institute talks about development of China's first AESA radar for fighter jet. It will be x-band based and won national awards in 2009/2010. From that, it seems like they flight tested it by 2009/2010. From all of that, it seems likes this radar is developed for J-10B/C although we have heard rumours on Chinese bbs that the first batch of J-10B we saw are using PESA radar. None of which is conclusive. So this AESA radar is either going to already be on the first batch of J-10B that we saw or on the second batch (J-10C as some calls it).
Technology wise, the article claimed that it has same level of technology as APG-77 on F-22. And that 14th Institute is using experience from developing this radar to develop J-20's radar. For the first part, I think it could just be talking about the usage of GaA T/R modules and the design of the radar rather than the actual power/capability of the radar.