Do you guys know that PL-9 is a reversed engineer copy of Israeli Python 3? The original Israeli Python 3 (PL-8) without the reverse engineering one (PL-9) has more than 1/3 of the range, the range was decreased in order to export the missile without violating the Israeli terms with the Chinese aircrafts like F-6/F-7/A-5/etc. China was so faithful to Israel with the development of the missile that it didn't pass the missile with the same range or was unable to do so (unlikely) to Pakistan. So this should tell us about how important Israel is to China in terms of defense development that Israel was kicked out of the JSF program because of the further defense collaboration with China, and it had to stop due to high reliance with the western world. So in the end it is likely that China looks its interests first regardless of alliance (so do all the countries), and it was highly unlikely that Pakistan transfered its F-16 technologies to China. So for all those wishful thinkers from other boards who think that China would even possibly defend Pakistan against foreign invasion are highly mistaking. Brothers, Pakistan border isn't made to be protected by other foreign militaries. So its either us, or nobody.