China doesn't tolerate separatism, be them from Xinjiang or Tibet, that's why now both Xinjiang and Tibet are peaceful, prosperous and very developed, hopefully Pakistan will do the same, never compromise to separatists.
Seperatism is not necessarily bad everywhere. China has adopted communism which can treat man as a man like protestant christianity or islam - if china degenerates to han racism then i will sympathize with uighurs and others. But in brahminical empires and racist empires separatism is good and must be encouraged.