Fairy tales are usually divided into the following categories: 1. Traditional fairy tales: These stories usually appear in traditional forms, including myths, legends, and fables. They usually tell stories about heroes, monsters, fairies, elves, and other traditional characters. Children's fairy tales: These stories are written for children and are usually easier to understand. They include the simple experiences and adventures of the protagonist, as well as some simple rules and moral education. Grimm's Fairy Tales: This collection of fairy tales was created by the Grimm Brothers in Germany. It includes many classic stories such as Little Red Riding Hood and Cinderella, which are loved by children all over the world. 4. Hans Christian Andersen's Fairy Tales: This collection of fairy tales is a collection of famous fairy tales from Denmark, including many classic stories such as "Ugly Duckling" and "Daughter of the Sea". These stories have a profound influence on children all over the world. Modern fairy tales: Modern fairy tales usually reflect the theme and problems of contemporary society, such as "The Little Prince" and "The Three-Body Problem". These stories are not only suitable for children to read, but also very popular among adult readers.