This is a mix of what I've read on Weibo, Chinese forums and my own guesses: Some claim it uses WS-13/13E engines (not a big surprise); it is currently used as a testing aircraft for avionics and radar, AKA this is not the first prototype for carrier-based 5th gen fighter as some claims; no tail hook as can be seen on the picture.
While I've seen some claim that the flaps and ailerons are seperate in the picture (yellow arrow) I disagree. From what I can see the arrow points toward some sort of circular protrusion which is most likely a sensor for testing purpose, and the flaps and ailerons are still one and the same.
TL,DR: This is still the same prototype we've been seeing for a few years, but I think the very fact that it's still flying can be seen as good news.