Other ethnic groups were either small and confined to limited localities (such as the Buddhist Turpan Uyghurs in Wuling, Hunan, and the Babylonian Jewry of Kaifeng, see Kaifeng Jews), or were forced to assimilate into the Han Chinese or Muslim Huis (such as some Christian and Jewish Semu in the Northwest, who, though thoroughly Islamicized, still unto this day retain peculiar labels like "Black Cap/Doppa Huihui", "Blue Cap Huihui").