Bird of Immortality, Where Can It Fly?

Immortality, a very slow story, the protagonist is single, and there are no lolita? For human civilization, one thousand years is the distance from the Paleolithic Age to the Information Age. For her, a thousand years is just the tail end of infancy. She has spent an unimaginable amount of time on this planet. She had seen the ecstasy when humans learned to grind stone tools, she had seen the first seeds that were deliberately buried in the soil break out of the ground, she had seen the casting of bronze, the quenching of iron tools, and the formation of characters on clay tablets. She had seen too much human death. I have also seen too many rebirths of human beings. This is a slow story, It is also a story about long-lived species and short-lived species. The characters in this book are all adults