The story of the Green Goose in the Decamon of Boccaccio is as follows: In the Tenth Day, Boccaccio told the story of a green goose. This green goose lives in a beautiful garden. Its feathers are green and very beautiful. The green goose liked to play in the garden and make friends with other animals. One day, the green goose met a fox. The fox saw the beautiful feathers of the green goose and wanted to make friends with it. But the green goose didn't want to make friends with the fox because it thought the fox would bring it danger. The fox said to the goose,"Your feathers are so beautiful that you must have many friends." I just want to be friends with you because I like your beautiful feathers too." The green goose listened to the fox and agreed to make friends with it. So they began to play and communicate with each other. However, Green Goose soon realized that the fox was not a good person. The fox often deceived the green goose into making the wrong decision. The green goose realized the fox's true intentions and no longer trusted it. In the end, Green Goose left the garden to find a safer place to live. This story tells us to be careful when making friends and not blindly trust others. Only through a deep understanding could one judge a person's good or bad and make the right decision.