Question, are you going to do something regarding the Sassanids that fled to China after the Arab conquest of Persia? From what I know, Narsieh, son of Peroz III (son of Yazdegerd III, last Sassanid King of Kings) fled with his father to China where they attempted to reconquer Persia which failed, they lived the rest of their lives in China with prestigious positions and marrying chinese nobility. Apparently Narsieh even adopted the family name "Li". Sadly Narsieh and his uncle Bahram VII seem to be where information on the Sassanids in China stops, though they apparently did have descendants (both sons and daughters, with Bahram VII having a son's name confirmed, the name being Khosrau/Khosrow/Juluo), so I'm wondering if you might not have Sassanids in China thanks to this, or if you're going to include some made up ones (or ones that I missed) as easter eggs.