The timeline is batshit insane. The DPRK giving up nukes and the southern puppet unifying korea AND the US troops leaving? Lul, detached from reality. If the former would happen, the US and the South would invade. If the middle would happene, the US would immediately set up bases at Chinas border. The latter would only happen if the US would either forced to leave or no longer be able to project hard power on the korean peninsula. So either a military defeat there or a catastrophic decline of the USA.
Xinjiang, inner Mongolia and Xinzang declaring independence would only mean 3 more Han mayority states. Again detached from reality this would happen.
Also the yankee inability to look up the official english name of the ruling part of China is a mental illness to be studied: It is the Communist Party of China (CPC), not Chinese Communist Party (CCP). Seriously, it takes less than a minute finding this out, and knowing the funamentals of translation: If a offical translation exists, that one is the correct translation, never use coloquial ones instead.