You'd think if this had been developed already that it would be one of the most militarily valuable assets one could have..
And in That case.. After having had it secretly for so long you now allow it to be revealed to the public but safely by presenting it as new emergent technology.
Good thing we don't live in That world though and how all this is merely conjecture....
And, of course china is the leader in technological developments so if they've only just developed a piece of tech you can be damn sure that no other country in the world has.
Fo shizzle.