Informal version: Fate, wonderful, infinitely mysterious, even if you are beyond the fate of cause and effect, you can't get rid of that mysterious fate. In the world, that inadvertent glance, a rubble, or even an inadvertent rumor... It's all fate. I seem to have seen you, in the prosperous era full of fireworks, in the red dust of flying dust, in the fragrance of the flowing years, in the chaotic times of blood and rain, have we ever seen you? In that ethereal legend, in the poignant and poetic retrospective, in the obsessive and picturesque reincarnation, in the unreachable dream of the past life, have we ever met? Official version: Countless years ago, the ancestor of the Immortal Dao led all living beings in the world to transcend the era, outside the endless worlds, bloody battles against endless enemies, but in the end, due to the siege of strong enemies, outnumbered, fruitless, that day, the endless emperor snow, accompanied by the world's sinking, fell inside and outside the world, and since then an era has completely disappeared. Time flies, the years go by, the epochs change, countless civilizations rise and die, this life, Shinto prosper, this day, a young man walked into the secret realm of burial immortals, at that moment, the once disappeared emperor snow flew into the sky again, fluttering inside and outside the world, an ancient legend, began.