Please...
..As if you can say something here that I have not heard before. Like I say, when your fellow 12-yr old Chinese friends could not win on purely technical grounds, even when presented with impeccable sources like IEEE, they resorted to personal and racist attacks. So do not presume that I doled out those labels for no reasons.
Do you why China did nothing over that? Because the Chinese government know it was an accident. You asking this question mean you do not know the technical aspects of GPS and GPS guided weaponry. Google is your friend, even if it is an American product, so go use it and learn something new.