Add Xinjiang to the list of current ones - from https://www.nytimes.com/2019/03/02/world/asia/china-muslim-d..., flagged off the HN front page: "Decades of migration by Han, China’s dominant ethnic group, have transformed Xinjiang, fueling Uighur anxieties. Uighurs, once the majority, are 46 percent of the region’s 22 people million people, Han are 40 percent and Kazakhs 7 percent, according to government estimates."