Let's say Chiang gets alot more support from the Allies, and after figuring out where Mao is hiding, launches an all out assault on his hideout, and although the Kuomintang army suffers heavy casualties, Mao and the rest of his comrades that would have had formed the government of the People's Republic of China put up a vicious fight. But, Chiang stopped it that night, as Mao and the rest of his followers were excuted. The ones that got away either left to the USSR or the United States.
Now, what would Chiang have to do to prevent a another future civil war from happening? Also, how would a non communist China change history? Would the Soviet Union make its main allie North Korea then,instead of China? Will China still be considered a force to be reckoned with?