US vs CHINA: Who wins?

China has something like 100,000,000 soldiers. That's roughly 1/3 the population of the US. Lots nukes, etc.

US is, well, the US. Lots of nukes, top technology, etc.

Who wins in an all out war with no other countries involved in any way?

The US would have to do is fly over China with crop dusters filled with VX.  That would take care of their 100,000,000 troops easy.