"They returned to China carrying Wahhabi books, leaflets, fatwas (religious rulings), and sermon tapes that broadly disseminated Salafi ideas. Other significant channels included the arrival of Saudi organizations and preachers in China during the 1980s." "The activities of these groups were greatly facilitated by a network of Chinese Salafi activists who had graduated from Saudi or Saudi-affiliated institutions like Imam Saudi University, Umm Al-Qura, and Medina University." (thanks Amir)