We (US military forces, that is) would position our Naval Fleet east of Taiwan (use your imagination). This would represent the climax of a months long build up of US forces in the region to bolster US forces already present on regional rotational deployments. Simultaneously, US Naval and Naval air forces would launch mass ballistic and cruise missile strikes from vessels and aircraft targeting Chinese military bases, ships, radar installations, low orbit satellites and infrastructure, such as power and other utility plants.
On the heels of constant US missile bombardment and round the clock bombing sorties, US Marines would conduct coordinated amphibious landings at multiple key strategic Chinese coastal areas while US Army Airborne forces parachuted into key Chinese population areas to gain a foothold and buy time for mass waves of D-Day like US Army and Marine Landings. Most likely we would launch other invasion fronts from India, Pakistan, the Indian Sea and from Southeast Asian nations.
My prediction: the Chinese air force would last about a day. Once we (US forces) achieved total air superiority the Chinese government would collapse within another two days and the Chinese military would surrender, unconditionally, within a week—probably less. If Chinese military or political authorities resorted to strategic or intercontinental nuclear response we would "Hiroshima" their entire fucking country one fat, overpopulated city at a time.
The whole shebang would be over within two weeks. Two weeks after that we'd install a nice puppet government and resume full production of all the rubber dogshit we buy from the Chinese.
Case closed.