This thread isn't going to be a discussion of why or how the ROC wins ITTL. Perhaps Chiang doesn't do [something dumb] and does [something smart] while Mao doesn't do [something smart] and does [something dumb]. Whatever the cause or POD - The National Revolutionary Army utterly smashes the PLA, leading to all of China (both Taiwain and the Mainland) falling under the control of the KMT government.
Now, assuming this alternate Chinese Civil War ends in 1950 as IOTL (because reasons), how does this affect the Cold War and East Asia in particular?
How does Korea play out? Is Tibet still doomed to an annexation? How about India, will Nationalist China get along with New Delhi? And Vietnam, will it ever be an issue ITTL?
And of course, what sort of future does KMT China face? That of a mega-South Vietnam or that of a mega-South Korea?