The trade routes of the Silk Road are also known to have reached Korea, Japan, and what is today eastern Russia by this time, contributing to these exchanges. Against this background it is from China, in particular from Chang-an during the Tang Dynasty, that Christianity also first came to Korea and Japan. In the case of Korea, where Christianity seems to have been present, evidence has been found in the Korean Chronicles Sanguk Yusa and Sanguksa, for the presence of Nestorian Christianity during the united Silla Dynasty (661-935).