The one constant with Chinese military tactics is the total disregard for casualties. No matter how difficult the operation, the human cost has always been a small matter to them historically. Add in the communist disregard for human life, and you have a scenario for miscalculation that could be disastrous for life as we know it. Trump is the only leader in the west that has shown enough gumption to possibly forestall PRC aggression. His re-election is essential.
China has an unlimited number of young males that they could volunteer as cannon fodder.