Fairy tale of Screw Girl: Once upon a time, there was a young man who was honest and diligent, naked and unmarried. He comes back from working in the fields every day and has to cook by himself. One day, I came home from work and found that the food had been cooked, but I didn't know who cooked it. It's been like this for several days in a row. He thought, I must know who secretly made a fire for me to cook. He went to work in the fields again. From a distance, he saw smoke rising from his house. He shouldered his farm tools and ran home. When he got home, he found that the food was gone. The next day, he left home with farm tools and went to a nearby place to hide and observe. When he saw the smoke rising, he rushed back and pushed open the door. He saw a beautiful young woman cooking. "Who are you? Why did you cook for me? " The girl smiled: "I am a refined screw." See you naked, diligent and honest, I will cook for you. " The young man was very grateful and held the girl's hand tightly. "Thank you very much. If you don't dislike it, marry me and live with me. " Screw girl blushed and readily agreed, and the two began a happy husband and wife life. Have a baby in the second year. Watching his son grow up day by day, the man was so happy that he forgot his appearance. He said to his son who was playing in the rain under the eaves, "Di-Duo-Di-Duo, your mother has a snail shell on her back." This sentence hurt the screw girl's great self-esteem. Her face suddenly changed, she said; "snail shell? Where is the snail shell? " The son stretched out the snail shell he was playing with to his mother: "I'm here." The snail girl took the snail shell, turned into a puff of smoke and disappeared into the sky, leaving only her stunned son and father.