What kind of story is Guanyin?

According to the Himalayan website, the story of Guanyin Dragon Girl is the thirty-seventh in the story book "China Ancient Myth Story", which tells that the Dragon Girl was originally the little daughter of the East China Sea Dragon King. She was very clever and won the favor of the Dragon King. But later, it became the story of the Virgin beside Guanyin Bodhisattva. It can be seen that the story of Guanyin Dragon Girl is a fairy tale.