Historical records have this record: "Phoenix Nirvana is a legend of Tianfang Kingdom. The phoenix in Phoenix Nirvana refers to the fire phoenix, the immortal fire bird in mythology. It is said that the phoenix burns itself to ashes every 500 years, and then is reborn from the ashes, and the cycle continues, becoming eternal life. The extended meaning: the phoenix is the lucky one in the world. The messenger of happiness, every five hundred years, will bear all the unhappiness and hatred accumulated in the world and burn itself in the raging fire, exchanging the end of life and beauty for the peace and happiness of the world. Only after experiencing great pain and hardship can they gain a better body. The phoenix was born in the Dan Cave in the south and built its nest on a high cliff in Yongzhou (now Nanning, Guangxi). The phoenix is covered with colorful feathers and is as big as a peacock. The feather crest on its head is always filled with water, and the male and female take turns to eat. There are also records. Phoenix builds nests in the deep forests of the Liangjiang area. After laying eggs, the male phoenix mixes wood branches with peach gum to seal the female phoenix in the nest, leaving only a small air hole. Then the male phoenix looks for food to feed the female phoenix. If food is obtained, the cover will be removed. If no food is available, the hole will be blocked and the female phoenix will suffocate to death.