That would be a bad idea. Do that and you can't take it back...the world would be changed forever and probably not in a good way.

The PRC is almost certainly not stupid enough to use nuclear weapons against US forces (or anybody else for that matter). They are vastly outgunned and while they have the range and sufficient weapons to target all major US cities, some US ABM defenses are already in place...

The only conceivable conflict between PRC and the US would be over Taiwan, which is not important enough to either contrary to go nuclear over. Since Taiwan will inevitably reunify with the mainland eventually I think both sides would vastly prefer the status quo until that happens on it's own.

Also money talks, BS walks...both national economies depend heavily on each other, neither could afford to go to war over anything trivial.