1. The old tree hugs the old man and writes about the close relationship between the old man and the old tree. The old tree is the old man's spiritual support, allowing the old man to ignite hope and persistence for the future in the midst of incomprehension and despondency.

2. The old man and the old tree snuggle up to each other, writing the noble realm of man and nature in harmony. It expresses the author's yearning and pursuit of this noble spirit and his high praise for it.

3. Calling for more people to get close to nature and live in harmony with nature. ***Create a blueprint for our beautiful existence.

4. Renders the atmosphere for the article, makes the article more infectious and persuasive. Cause the reader's emotional ****ming.

5. makes the structure of the article more complete, in line with the distinctive features of the novel genre