What if KMT keep the Mainland China in 1949, and the PRC didn't establish? I think the Chinese culture would keep, Cultural Revolution would not happened. The art would continue. USA would regard China as an outpost to fight with Soviet Union. The Outer Mongolia would not indenpendence and the Vladivostok would returned; as those were important frontier to against the Communist. But the Tibet might left, because of India want buffer. And the western power like Tibet and didn't want China too strong.