What thoughts and feelings does Han Yu's Dead Tree express?

Han Yu's Dead Tree expresses his pursuit of value in his later years.

The old tree has no branches and leaves, and the wind and frost no longer invade. People can pass through the abdomen, but ants are still found. Trust only fungi. Throw it away. You can also change the fire, but you are unwilling but hollow. There are no branches and leaves on the old tree; The wind and frost have stopped attacking it. The trunk can be crossed by pedestrians; Bark peels off and even breeds ants. Only the fungi of ephemera live on it; At dusk, there are not even birds to roost. You can still use it to drill wood for fire; No, it's just empty inside

In August of the fourth year of Changqing, Han Yu asked for leave due to illness. In the same year1February 2, I wrote a poem "Dead Tree" to express my value pursuit in my later years. What is the image of dead trees depicted in couplets and necklaces in poetry? Please summarize and briefly analyze it. The poet described a withered and useless dead tree. Rotten trunk can pass people, bark is peeling off, and ants are chasing it, so it is "destroyed". The branches don't even want to throw yellow birds. Only fungi can support it, which shows that it is "useless".

Dead tree analysis;

"The old tree has no branches and leaves, and the wind and frost no longer invade." The poet pointed out from the beginning that the dead tree in front of him was so unbearable. Under the attack of wind, frost, rain and snow, its branches and leaves have already withered completely, leaving only the trunk, standing between heaven and earth. Its only branches stretch out into the sky, and there is a sense of sadness. At this time, he is no longer afraid of wind and frost and sticks to his dignity as a tree.

After all, the dead tree has lost its vitality, and the trunk has begun to rot, even hollow and penetrating, and even pedestrians are not allowed to pass. Its bark has peeled off and even bred ants. How can a man deserve such a tree? When a poet writes about dead trees, he is actually writing about life. He has reached the twilight of his life. Is his strong heart still there?