After what China did to Japan 500 years ago (under Mongol rule) (not Mongol rule as a hexbearer pointed out actually), they have no right to condemn Japan for anything; also bacteria, viruses, what's the difference? Also it was an attack, not an epidemic that formed naturally like they have throughout history.
The foundations for the modern communist threat we face today were laid out by Cao Cao
Adding Lu Bu's escapades to the Black Book of Communism.
China still has hell to pay for it's treatment of political dissident Diaochan
Chairman Mao had a somehow positive view on Cao Cao somehow, he thought if Cao Cao somehow won earlier he could end the Three Kingdom period before it even started and subsequently less people would die.