There is nothing to prepare for because the only possible war between the USA and China is a nuclear war and such a war has no victor. Both countries are "prepared" in terms of nuclear weapons.

The USA is clearly not prepared to sacrifice any of its own cities to prevent an invasion of Taiwan.

All this sabre rattling and military buildup only serves to put money in the pockets of the military industrial complex and/or build military capabilities for each country to exert its will within its own sphere of influence.