Islam in China has existed through 1,400 years of continuous interaction with Chinese society. Currently, Muslims are a significant minority group in China. Hui Muslims are the majority Muslim ethnic group in China. The greatest concentration is in Xinjiang, with a significant Uyghur population. Lesser but significant populations reside in the regions of Ningxia, Gansu, and Qinghai. Various sources estimate different numbers of adherents with some sources indicating that 1.5-4% of the total population in China are Muslims. Of China's 55 officially recognized minority peoples, ten groups are predominantly Sunni Muslim.