Chi-wen, who was one of the Nine Sons of the Dragon King, was named protector of the home because of his relentlessness in watching for danger on the horizon. Chiwen’s tail which could fling water like that of a whale was also named to protect the home from rainfall and fire. He was also fond of gulping and would consume evil influences within buildings which he protected. Chiwen’s image was used to adorn the roof ridge of the buildings he protected.