The expansion of commerce between the Chinese and Persian states, and the re-establishment of caravan routes, helped make possible the arrival of the first Manichaean missionaries to China in the seventh century of our era. Thus, in 694, a Persian with the title of fuduodan appeared before the Chinese court carrying “the false religion contained in The Book of the Two Principles,” Erzongjing. In 719 another Manichaean dignitary, bearing the title of muzhu and versed in astronomy, was sent to the Chinese emperor by the viceroy of Tokharestan. Some twenty years later, on 16 Jul, 731, a Manichaean Bishop, also called a fuduodan, completed the Compendium of the Doctrines and Rules of the Religion of Mani, the Buddha of Light. The resulting edict, which required the translation of this work, was designed to allow the Chinese authorities both to obtain a complete overview of Manichaeism and to indicate what attitude to take in its regard. Accordingly, the next year (732), an edict was promulgated which, while condemning Manichaeism, granted religious freedom to its non-Chinese adherents.