To the victor goes the spoils. No disagreement with that.
Mao won and Chiang lost. So today mainland China is fulfilling its destiny under the red flag.
Of course China almost lost WW2. It also changed owners a few times over the last 2000 years. Lesser told are stories of attempted invasions and uprisings, natural disasters, floods, famine, epidemics ... which is just business as usual for a big country.
China has survived till this day due to its people and collective consciousness honed over thousands of years. And it will take more than a few scheming foreign devils to end it.