Photo: Modified J-20 via Alert 5

This jet is alleged to have the serial number 2011, 1st jet of the 1st limited production series.

A few things.  First I'm not an aviation guy but that looks like a "F-22" treatment so I guess thats to improve either control or could it be a LO treatment?  I don't know.  Second, if they follow the same game plan as they did with the J-10 then we can expect incremental improvements until the decide to enter full rate production.  They appear to be on a much faster development schedule than the F-35 though.  However they're doing it, it might enter service at the same time as the F-35 (I mean real service, not the nonsense the USMC is doing).

Hopefully the US Navy is all over getting the F/A-XX going.  Hopefully.