I saw this and thought it might interest you:
There are at least seven secession movements in China. This mentions three.
During a session of the UNPO’s XV General Assembly devoted to UNPO members in the Asia-Pacific region, a key theme arose that affects many UNPO members – repression by the People’s Republic of China (PRC).
The peoples of Tibet, East Turkestan, Southern Mongolia, and Hong Kong, as peoples who live within the borders of the PRC, have long suffered from state repression. Today, in addition to domestic persecution of minorities, the Chinese Communist Party is also exporting repressive policies beyond its borders, leading client states such as Pakistan and Laos to undertake extreme repression against their national minorities as an indirect result of massive Chinese investment as part of the Belt and Road Initiative.
In this context, the UNPO XV General Assembly has adopted a resolution supporting these people’s fundamental rights and freedom of speech, conscience, and religion. The extreme use of force against these communities, which in a number of cases has involved imprisoning large numbers of people, is a trend that has been accelerated in recent years.