Islam was introduced from Arabia in the seventh century. There are two major sects--Sunni and Shiite--with Chinese followers primarily belonging to the former. The vast majority of the 10 ethnic minorities of Hui, Uygur, Tatar, Kirgiz, Kazak, Ozbek, Tajik, Dongxiang, Salar and Bonan, totaling more than 20 million people, are Muslims. Currently, there are more than 30,000 mosques in China.