Religion in the Song dynasty

thumb|Ma Hajji, a Song Dynasty official in Yunnan (a descendant of Sayyid Ajjal Shams al-Din Omar), and his young son Ma He, future admiral [[Zheng He, as imagined by a modern Kunyang sculptor.]] The Semu () were the name of a political class in Imperial China, made up of foreign experts who came to serve the political systems of Imperial China. The Semu were not a self-defined ethnic group unto themselves; rather, "Semu" was initially an exonym for various Central and East Asian peoples under the Yuan Dynasty. The Semu were one of the four "castes" which Yuan society was divided into, along w

1075 Daoist text on internal alchemy by Zhang Boduan