[C19fan]

The J-17 appears to be a knock off of the F-16.

[sukhoi-30mki]

Not a knockoff; it has legitimate American origins.

http://www.globalsecurity.org/military/world/china/j-7p.htm

[rjsimmon]

The J-17 appears to be a knock off of the F-16.

And a really poor one at that, combined with an F-20 Tiger Shark. Makes for one ugly aircraft.

The J-20 appears to be 2x the size of the F-22 and F-35.

China doing what China does best, copying the US.