The relationship between Bai Tang and Yan is different in different versions. In different versions, there are some enemies, while in the other versions, there is still a benefactor relationship. Bai Tang and Yan used to be twins, in which Yan was Bai Tang's brother, and both of them were the sons of the legendary Xiu, but Xiu, the protagonist, never appeared. As time went on, both Yan and Bai Tang grew up, but the gene of Bai Tang. Then Yan wanted to seize the powerful power of sugar, and then stopped the erosion of dark sugar. After that, sugar and Yan turned against each other and became enemies. Some people thought that sugar would eventually become a figure like Father Xiu, and eventually the sugar in Beijing Opera became the patriarch of twelve clans.