Contrast: The poet is outspoken, comparing his past ambition, heroism and desire to make contributions to the country with the reality that he can't serve the country, and he is indignant and dissatisfied.

He created an image of a patriotic poet with white hair and undiminished ambition. He was always worried about the frontier and groaned in pain.

Supplement:

Complain about one's feelings

Lu you

In those days, Wanli sought a seal, and one horse guarded Liangzhou. Where is the dream of closing the river, the dust darkens the old mink and fur.

The Hu people are still alive, the temples are frosty in autumn, and the affectionate tears are dry. Who would have predicted this? Heart in Tianshan Mountain, old in Cangzhou.

This poem describes the boring image of a hero who resists gold. The characters in the poem once galloped on the battlefield, but now they are abandoned, but they still have the ambition to serve the country and are attached to the golden front. Through the shaping of this image, poetry expresses the feelings of unfulfilled ambition and no way to serve the country.