This belligerent attitude by China to a peaceful nation doing legal activities, sure reflects well on our trying to get North Korea to come around...not!  North Korea`s wacko leader see`s China bumping ships of peaceful nations, and striking other aircraft in the air with their aircraft.. and we do nothing but protest.  No wonder to N.Korea we seem a "paper tiger". they can intimidate us even more under China`s skirt soon, with a nuclear weapons development and delivery program.  We have asked China to rein in north Korea many times...and each time to no avail. 
 If we do not stand for peace defending vigorously against these provocations of nations in the area by China now.... when will we ever? 
What will it take? another pearl harbor type sneak attack at anchor?  That`s too late and too little I`m afraid.  Communism is as bad today as it ever was.. though the Chinese brand has lipstick on it, and a faux stock market, it`s still a repressive regime that brooks no opposition. None.