Post-WWII, Chiang Kai-shek was far too friendly with the defeated, disgraced, and oft-hated Japanese military. And the blatantly racist Americans. Vs. Mao was friendly with (if often made out to be a tool of) the Soviets - hardly nice people, but in China far less ill-behaved or loathed. Since Mao won the Chinese Civil War - with considerable help from the Soviets, and far more help from the cruelty, corruption, and poor company of the Nationalist regime - then "dialed back" Soviet power and influence over the following decades, he'd seem the obvious winner of the "Freed China from Foreign Domination" crown.