China will act—Biden will react—by going to the UN, writing a letter and talk big—maybe send Obama to make peace. (or Hunter). This could go bad really fast. What if China seizes those little Japanese Islands? What if they snuff out Hong Kong? wat if they boldly move in to Taiwan? Or move on India? or Vietnam? Or even back North Korea in a move against South Korea? What id China orders all US troops out of Korea? Would Biden comply? You Bet!
There is no telling how/what is the works. That is good you are questioning everything though.