one point i would like to make here specially in reference to some comments from chinese typing masters - one thing is black and white and that is the US lead in millitatry tech areas and the world follow or attempts to follow to reproduce what US made public decades ago, example 5th gen fighter, what we dont know is what US has not made it public yet, if it comes to US national security, they can crush the whole world one side and they being at the other side..Chinese can make big statements but they will not dare to sink any US assets anywhere in the world, their defence department may probably know this bitter fact. Period.