What is the poem in Du Fu's "Meeting Li Guinian Downstream" that expresses profound meaning with flowers in late spring?

In Du Fu's "On Meeting Downstream", there is a poem with profound meaning that flowers are spent in late spring: it is a beautiful scenery in the south of the Yangtze River, and you will meet a gentleman when the flowers fall. Autumn: the end of spring, usually referring to the third month of the lunar calendar. Falling flowers have many meanings, such as old age, social ills and chaos. The beautiful scenery in the south of the Yangtze River is in a strong contrast with the chaotic life experience of being divorced from the times and sinking. An old singer and an old poet reunited in the wandering, and the flowing scenery dotted with two haggard old people became a typical portrayal of the vicissitudes of the times.