Arab traders, were spreading there religion overseas to East Africa,and Ceylon. The Caliphate is mainly an economic power due the failure of conquest. Meanwhile in Europe The Anglo-Saxon Heptharchy was in civil war again . In Alexandria the libary got even bigger by 10,000 books. The first Zoroastrian Temple opens in Guangzhou to service Persian traders,and chinese converts.These Chinese Converts would be called Baihuoren which is chinese for Zoroastrian.
In Iran there were many innovations in science and medicines. The First standardized medical book called " The Art of Healing",it was made by a persian court doctor named Yakob. It made treatments standard for treating basic diseases like the flu,measles,and etc. It Increases medical knowledge like in preventing the spreading of disease. Due to the spreading of east ,and west , there was a strange culture developing in Persia that was syncretic.
In the western part of the empire , they had a falling out with the Avars
due to the new Chieftain allying with the Byzantines...