I tho you was siriously joking. China just wont invade united States, there are some simple things why this wont happen.
-No matter who win, attacking United States is as attacking half of the world. ( France and U.K. wont be happy with this nor Canada)
- In our actual world the UN have basically an unmesurable power with the international justice court and all the other things they have.
-Probably China has a epicly big army, but c'mon United States is just overpowered with all the technology...
Sorry for bad grammar. I was fast typing.