Demon Slayer Immortal Record

I'm Duan Nian, and things got serious. When I opened my eyes, I found that I had taken the immortal's body, but fortunately, I got the golden finger at the beginning - the record of demons and immortals, and all the immortals were wiped out with one stroke of the pen, hehe~ No, I am a fairy! Are you saying that the catastrophe in the lower world is just a change of currency ownership? What is the relationship between this world and the earth? I am Duan Nian, but... Am I "Duan Nian"? What did "I" do in the past, and what should "I" do in the future? This world is the world of immortals and heaven, why can't it be the world of all living things?