Immortality is a neutral word. We can't deny history and culture, but we can't understand its scientific nature. There are also records of immortality in ancient books. As modern people, we are more yearning, but we can't verify the facts. If you are a fairy, there are several people in history.
The "too old gentleman" in The Journey to the West must be familiar to everyone, and it set a turning point for the Monkey King. In fact, too old gentleman is mortal, and that is Li Er. Li Er is a legendary name, and all of us are more familiar with his other name "Laozi". According to legend, Lao Tzu rode a green cow to Hangu Pass, and then the Tao Te Ching was handed down. He was a figure in the Spring and Autumn Period. After he became an immortal, he was called "the old gentleman on the throne".