Sources: Albert Herrmann, Ph.D., "History and Commercial Atlas of China"(Havard University Press, 1935) 十四世紀以前中國和中亞的外來宗教
（ Foreign Religions in Central Asia and China up to the 14th Century A.D. ）
Sources: Albert Herrmann, Ph.D., "History and Commercial Atlas of China"(Havard University Press, 1935)