What were the primary religions of mainland China at the turn of the millennium?

Rob: What were the primary religions of mainland China at the turn of the millennium?
Just curious: what were the primarily religions of China during the turn of the BCE/CE time frame?

And for extra credit: what is the time frame of the origin of Buddhism?

Answers and Views:

Answer by devouring_wind
Buddhism, Taoism and Confucianism. Buddhism was founded around 500 BC.

Answer by wenshidi
Try the work of an Australian scholar on this fascinating subject.