Of course it was the Nationalist Chinese who were fighting the Japanese, not Mao.
And America defeated Japan. Not China.
Yes, but the Chinese did tie down a lot of Japanese troops in China. I don’t know if that made any difference to the Japanese ability to fight elsewhere. Heard on a recent program on C-SPAN that the Japanese were interested at the end in a cease-fire with the US to allow them to continue their war in China. Of course the US would not accept that.