Depending on which version of the story we hear, this girl either flew to heaven when she was 28, or drowned at age 16 while saving the fishermen in her family.
Buddhists sought to incorporate Mazu into their worship, so they included her in their temples. In this way, it became said that Mazu was actuaily another manifestation of Guanyin.
In all these stories illustrate Guanyin's compassion and her use of skillful means to save people.