The J-10 looks suspiciously similar to the Lavi and we know China and Israel had military ties back then with China license producing the Python AAMs.
But the wing is different as is the intake. I wouldn't be surprised if they got initial Lavi data but then changed the design.
Look at the tail of the Lavi and J-10. They are too similar.
Stop this nonsense! ... yes for sure the tail looks similar!
