Prior to Buddhism, China had Taoism and Confucianism, and Chinese folk religion involving the worship of various local deities has never died out. None of the Chinese religions are exclusive, they overlap, and people follow practices from any or all of them. http://www.patheos.com/Library/Chinese-Religion.html The Mongols practiced a form of Shamanism, and their chief deity was the Blue Sky. They made no attempt to impose their religion on those they conquered, in China or elsewhere, nor were they exclusive in their worship. Marco Polo recorded a conversation with Khublai Khan where he said, basically, that he honored and prayed to the gods of all 4 major religions so that whichever was greater in heaven would help him. http://afe.easia.columbia.edu/mongols/history/history7.htm