In US defence plan, China will be bombed preemptively, as a deterrent, invariably of us being a party to the conflict or not, just for the fear of us becoming a party to it.
This is a very stupid plan America have. America dug itself in into an unwinnable scenario the moment the number of credible nuclear adversaries exceeded 1.
They can't win, but they will still try.
I believe there is an understanding in the Chinese establishment now that full scale, unrestrained retaliation is the one and only reaction to such scenario invariably of the preemptive strike scale and intent.
If there is 0 chance to dull enemy's commitment to win at any cost, and the enemy is highly confident that he has the "trick" that will grant him victory in the end, you best bet is to make him understand that his "trick" was rendered useless on day one.