What on earth are you talking about? To invade Taiwan would be a military feat several times more complicated than the invasion of Normandy. It's unlikely, although debatable, whether or not the Chinese could do it even if we stayed neutral.
Ground forces notwithstanding, we've got enough naval power to swat away any landing force. You can't have an amphibious invasion without control of the sea lanes, and they sure as hell aren't going to control the skies. Even if they did, they don't have enough airlift to get their airborne forces into the game in sufficent numbers to make a difference.
This is to say nothing of resupply, command and control, communications, joint forces coordination, etc.