u worry about too much, U.S does not has confidence to fight China by herself, sure enough, America has some

die-hard buddies, but this time is different, if war breaks out, everyone will make death-or-live decision, because nuclear bombs. Japan will fight to death for sure, others are 50/50. If China  going to lose the war, i highly suggest, China must launch 600-700 nuclear bombs into Japan, each bomb should burn 300 square kms area, U.S will get 2500 bombs, Australia will get 200 bombs, Formosa will get 100 bombs, Singapore must get one bomb. The high tech world war is coming, like a huge Black Hole, everyone will fall into it, nobody can stop, avoid or delay it, even U.S, she can not delay it by herself