Legend has it that the eldest son of each generation of the Huangfu family, the head of the family, has a destined bride. When the two get close, the mark of the phoenix will appear on the bride's heart. After the two embrace for the first time (ahem, the first time they have sex), the phoenix on the bride's heart will remain on the bride's heart forever, and the mark of the dragon will be left on the heart of the head of the family.