... Continued from above
This sort of stuff although just a publicly available paper with little specifics revealed, show all the morons out there just how much of a difference even impossible to see details are. Millimeters and the smallest details in how a surface curves separate aircraft. Meanwhile these idiots see a general shape and intakes and cry COPY!
There are worlds of difference between being able to imagine and plan for an aircraft project, develop one and actually build it. Even reverse engineering a single piece is a technical ability that is held only by a small handful of nations.
On topic, are we to assume these things are involved in changing the FC-31 into the J-XY? Some of the mods that we should expect to find on the PLANAF fighter. Or something for academic intrigue destined for future developments. Would in interesting to see if the J-XY reveal include some new surfaces and an obviously unique canopy.