You forget the basic Chinese tactic during the Korean War - sending wave after wave of PLA attempting to make our machine guns' barrels melt. They probably have more bodies than we have bullets, and they won't hesitate to use them.
But, the fact remains we have more efficient ways to neutralize those "waves" than we did in the Fifties. We would never again depend upon machine guns as we had then.
My belief of Chinese military is they would do as tried in Iraq, hail liberation and blend into the general populus. Then when things seem better, use pock-shots, snipers, IED's, and guerrilla warfare in an attempt to tally an unacceptable US bodycount.
It's found as a way to "preserve" the infrastructure and be abled to continue warring rather than have the total country (and supplies) shut off from soldiers' use.