China placed something more than a mockup, but probably not a full aircraft, out for the public to take a look at and take pictures of. This is an
evolution of the J-31/FC-31/J35 line. I suspect this is some of China's method of signalling: letting the world know what's coming. They do it a
lot.
Might be better materials in an optimistic opinion, might not be intended to do actual carrier landings in this prototype, or might be an
underestimation on the wear and tear.