China must have reverse engineered it by now.
Put your f-16 blk 52 against any chinese fighter(not 5th gen). Chinese will get their tails behind.
That is the main reason Pak's focus is to develop indigenous capabilities. JF17 doesn't yet compare to the F16 but it will soon and probably even surpass it in terms of avionics(in future blocks) for a cheaper price.
Nothing can be said about capabilities of jf-17's.