lol China wouldn't bother bombing anyone

they'd just tell all their export ships to turn around and stop all exports

US would collapse in 30 days

it would be like the blockade US is doing to Cuba except 90% of every product we use and they wouldn't have to fire a single shot

they could also sell off the billions in US bonds and other assets

US economy would be utterly destroyed, we'd never recover because even the middle-class would be living out of their cars (now dead because all the parts for them are made in China)