This is a folk tale that has been passed down in Taiwan. The daughter of a mouse village chief was about to choose a groom by throwing an embroidered ball, but unexpectedly, a black cat rushed in and disturbed the situation. For the sake of his daughter's happiness, the mayor of the village decided to find a son-in-law who was stronger than the cat and the strongest in the world. After thinking about it, he thought that the sun was the strongest in the world, so he went to look for the sun. However, the dark clouds cover the sun, the wind blows away the dark clouds, and the wall blocks the wind. ...... Who is the ideal son-in-law for the Mayor of the Mouse Village?