In the story of the crocodile fish, the crocodile and the bird became good friends. Because the crocodile's appearance and reputation are very unpleasant, no one wants to make friends with the little crocodile, but the bird untied the knot of the little crocodile and he trusted the little crocodile to become his best friend. This story tells us that the most important thing between friends is trust, and mutual trust can make friendship last forever.