News circulating on the Chinese internet is that the new "350001" has new green-colored paint (IMO same as the J-15 prototype earlier this year), redesigned front fuselage that represent F-35, front-opening cockpit like the F-35, no (visible) refuel probe, no side weapon bays, no (visible) tail hook and ws-13 as the engine. (things in parenthesis are my personal annotations)
Personally I'm taking a pinch of saly on this, mainly because I can see absolutely no reason that SAC would go with the front-opening cockpit design...
I heard that too and this image was posted:
However IMO it is just the well known no. 31003 with the image slightly changing the grey colour from grey to a greenish-yellow. IMO this is never ever the J-35.