Are there any descriptions of immortals in ancient writings?

Luna is one of the most popular immortals in China. Moon God is also called Moon Goddess, Moon Star Lord, Moon Aunt, Moon Bodhisattva, etc. The worship of luna has a long history in China, and it is also a common phenomenon all over the world. It originated from the worship of celestial bodies in primitive beliefs. In the dark, the moon brings light to people; The dim moonlight will make people have a lot of reverie, which leads to many beautiful and moving stories, and the Goddess Chang'e flying to the moon is one of them. Legend has it that Chang 'e was the wife of Hou Yi, who shot for nine days and offended the Emperor of Heaven and demoted them to earth. Later, Hou Yi got the elixir of life from the Queen Mother of the West. After eating food secretly, Chang 'e went to heaven, lived in the Moon Palace and became Chang 'e. This incident is recorded in Shan Hai Jing, Search for Ji Shen and other ancient books.