Does he owns all of China (as in there is a separated "North China")? If yes then he'll probably work with Nehru in championing the Non-Aligned Movement, but he'll probably try to look good to the USA as the Soviets are right next door* and relation between those, particularly if USSR funds Communist insurgencies, are going to be rather cold. In more broad terms there is no Korean War as Kim won't invade the South if he is worried about the KMT crossing the Yalu, this would greatly alter the politics and economy of East Asia, the war thoroughly devastated both Korea's economies and destabilized both politically, in the North Kim il-Sung used the failure to purge most of the opposition and consolidate power in the South Syngman Rhee also went on scaling up political repression and purges, culminating in his resignation in 1960, although he was already old at the time and probably wouldn't rule that much; ITTL both Koreas would remain in an unease peace, maybe they develop in the same fashion as the Germanies. Japan was also greatly benefited by the war as the American demand for supplies lead to massive investment on the rebuilding of the Japanese economy and the threat of Communism taking over in Korea lead to the formation of the Japanese Reserved Police (which would later turn into the JSDF) and the hasting of the Treaty of San Francisco, the occupation of Japan couldn't last much longer honestly but you may see a slower recovering Japan with maybe no military whatsoever.
Vietnam also greatly changes as North Vietnam is now completely isolated from the Communist World, but I don't know much about this to comment.
For the minorities we get more in the inner instability that will definitely plague the RoC for the next decades. The * earlier was to mention East Turkestan Republic, a Stalin-backed Uyghur-Kazakh state in Northern Xinjiang that was only disestablished after the CPC won and made a deal with them, how would it evolve ITTL (union with the USSR, bloody reconquest or an agreement with Stalin) will set the tone of both Sino-Soviet relations as well as how Chiang and the KMT would see the Uyghurs and other minorities anti-KMT stances. Worthy noting that during both the Warlord Era and the Nanking Decade provincial leaders in the Chinese Northwest underwent a policy of Sinicization of their territories, with consent of the KMT so expect those policies to continue for a while. Tibet is a goner, may not as immediately and bloody as the Communist invasion but the place is too strategically important for the KMT to left to its own devices.
On the inside the situation is a mess, however Chiang defeats the Communists the country is devastated, all Chiang's work in the economy and the military was destroyed and that will be China's greatest challenge; he needs to rein the warlords as soon as possible, that can be tricky as if he goes too harsh they main get him Xian'd again, but even as the RoC was collapsing he was able to remove Long Yun from Yunnan, which shows he was able to manipulate the warlords and their armies to some extend. The biggest stone in Chiang's shoe is of course the land reform that was promised for a while and isn't coming, I admit lacking knowledge in how to deal with it, but I must say that the survival of the Nanking regime will depend on its success.
In conclusion, don't expect a giant Taiwan/South Korea, China is too big and with many peculiarities (and issues) that prevents the same miracle growth, but you don't have to assume it'll descend into Africa-tier instability and economic catastrophe (ignoring also how China and post-colonial Africa are way too distinct to make such compassion), China has shows to reinvent and transform many times during the 20th century, the post-war RoC was different from the Nanking Decade in the 30s, that was different from the never-ending warlord wars in the 20s, that was different from the Beiyang regime of Yuan Shikai in the 10s, that was different from the late Qing monarchy of the 00s, there is no reason to assume the RoC will be locked down in the same static political situation (although it can if everything goes wrong of course).