Zhou Fankun (male) comes from the Book of Changes and was quoted by King Wen of Zhou from the Fuxi Xiantian Bagua Diagram, which means heaven. The earth within the earth, I hope the children can stand upright.
Zhou Fanxuan (female) is quoted from "Yi Si Zhan Celestial Phenomenon" by Li Chunfeng of the Tang Dynasty. It probably means that when the emperor stays, the phoenix chariot comes out. The meaning of dragon and phoenix in someone's mind