The phoenix is ​​a legendary sacred bird that is mentioned in Iranian mythology , Greek , Egyptian , and Chinese. But once every thousand years, it spreads its wings on a large pile of firewood and sings, and when it is excited by its song, it lights a fire in its beak, and by burning in the fire, another phoenix is ​​born from its ashes. In many cultures, the phoenix is ​​considered a symbol of immortality, sacrifice and long life.