There was a fly, and he didn’t know what a ghost was. One day, he saw a ghost and said, "Hello." The ghost ignored him. The fly got angry and slapped the ghost on the face. The ghost giggled and died. It turned out that someone behind him had a knife stuck in the ghost's body. One day, a fly was eating, and a starving ghost came over and asked: "Is it delicious?" The fly said: "It's okay!" The ghost asked again: "Why do you want to eat shit?" The fly shouted: "Shut up. Shut up, I'm eating now, don't say such disgusting things!"