While reading up stuff about the situation in mainland China in 1945 and in 1950, they revealed that the Chinese communists had numerous chances for a stable relationship with the US even as the Cold War was looming yet that window of opportunity was shrinking since the rejection of their offer to send a representative to the US to explain their cause more clearly, at least form my perspective. And of course that window was closed when the US pulled a variety of moves to tempt the PRC to intervene in the Korean War on the North Korean War in 1950.
In regards to this, the only two ways I can think of to get a positive US-ChiCom relationship is either have the offer get through or have the US not alienate the PRC during the Korean War; that is not having the 7th Fleet stationed in Taiwan and/or holding in MacArthur after the Inchon landing.
Is more ways to achieve this with a POD between 1937 and 1970?