There is more than one resource which states that a leased Pakistani F-16 Blk 15,along with the (abandoned) Israeli Lavi fighter,formed the basis for much of the technology found in the J-10 & FC-1/JF-17 fighters.The J-10 is supposedly China's equivalent to the F-16/Mirage-2000s,while the FC-1,which is being built for Pakistan resembles a juiced up Mig-21 with features of the F-16 & Mig-29.
Yes, we could talk all day about Israeli tech tranfers to China......:)