Bilibili is a Chinese social network platform targeted at anime audiences in China and other Chinese speaking countries, featured various services such as social network system, streaming services, hosted and published various mobile game servers in China, and a video sharing services that shared similar functions to Niconico and AcFun, including the famous danmaku comments.
It's nicknamed "B site", which goes along with AcFun's nickname "A site". The Japanese call it "Bilibili (biribiri) Douga".
