The first two sentences of Du Fu's "Meeting Li Guinian on the Riverside" recall the past glory and express infinite knowledge, while the last two sentences continue in the landscape show.

It expresses the author's infinite nostalgia for the prosperity of Kaiyuan, infinite emotion for the declining reality of national luck and deep sorrow for his own life experience.

Ordinary: How often? Many times. These two sentences reflect the poet and singer Li Guinian's experience of living in the same powerful family in the heyday of his life, and express the poet's infinite nostalgia for the prosperity of Kaiyuan.

Now is the time when the scenery in Jiangnan is beautiful, and I will meet you again in this late spring. The "falling flower season" is a metaphor for the decline of national fortune, the decline of life and the lack of prosperity. It expresses the author's infinite nostalgia for the prosperity of Kaiyuan, infinite emotion for the reality of the decline of the national movement, and infinite emotion for current events and the desolation of life.

In explaining the season of meeting friends-late spring, the "falling flower season" symbolizes the situation that the Tang Dynasty turned from prosperity to decline, and also implies that as the years of life, it is in the twilight of the falling flower season. These four words are very subtle and profound.

The first two sentences describe the prosperity of the past and pave the way for the following, while the last two sentences describe the decline of the present and express infinite feelings.

Expression: Contrast with the beautiful scenery in the south of the Yangtze River from the life experience of troubled times and degradation. Thoughts and feelings: express feelings about current events and bleak life.