Islam has been practiced in China since the 7th century CE. There are an estimated 17–25 million Muslims in China, less than 2 percent of the total population. Though Hui Muslims are the most numerous group, the greatest concentration of Muslims reside in northwestern China's Xinjiang autonomous region, which contains a significant Uyghur population. Lesser yet significant populations reside in the regions of Ningxia, Gansu and Qinghai. Of China's 55 officially recognized minority peoples, ten of these groups are predominantly Sunni Muslim.
