Um. I thought about this for a moment. The novel as a whole is that times have changed a lot, including Europe, ancient Greece, modern China and other countries. It tells the story of an angel boy, Su Fulan, who became a sacrifice when he was 3800 years old and contributed to a group of terrible people or gods who existed in another world and controlled Su Fulan's world. By chance, he met a girl, and she gave Su Fulan a rebirth. This rebirth... Triggered another story... In short, it is a fictitious existence. Any similarity is purely coincidental.
Purpose: Make a choice you won't regret