The story of a snake who became an immortal: she endured loneliness, enjoyed prosperity, endured separation and death, and was betrayed... No matter what the situation, she always had kindness as her foundation.
Looking back on her past, she figured out the reason for everything in the past: he repaid the kindness of protecting her for three hundred years by staying with her for the rest of her life.
Purpose: Good deeds and evil deeds will be rewarded, regardless of whether they are cows, ghosts, snakes, gods or emperors and subjects