Legend: The author of The Journey to the West invented a story, saying that Emperor Taizong recruited strange people to offer melons and fruits to the underworld, and a man named Liu Quan was willing to risk his life to find his beloved wife. Liu Quan committed suicide by taking medicine such as pumpkin on his head, and the ghost brought gifts to meet the god of hades. The terrifying was greatly moved, so he sent his husband and wife back to the sun. The local storyteller felt that the story was not enough, so he changed it and changed the pumpkin into the north melon. The reason is: because the North Melon was dedicated to the terrifying, there was no North Melon in the world since then. Storytellers are limited by small areas, and obviously don't fully understand that pumpkins and melons are actually the same thing. If he understands this, The Journey to the West's plot may have a new expansion-the clever Emperor Taizong just coaxed the old man of Yan once, and the favor he gave to the emperor of hades was just an empty name, and the real thing remained in the world.