Find an appreciation of Du Fu's Eight Poems of Autumn Prosperity (the third one), about 200 words.

Eight Poems on Autumn Prosperity (Part III) followed the first poem "Luhua in front of the continent" and became autumn scenery in Kuizhou. The first four sentences are clearly written in autumn, and the mood is upset. Every time thousands of families are still immersed in the morning glory of the mountain country, they sit alone on the hillside by the river and watch the fishing boats stay in the river. Swallows are always flying up and down. The combination of "flood season" and "fleeting" indicates the repetition of actions: "return" and "reason", revealing the poet's upset mood. The Necklace Association compared itself with Kuang and Liu with allusions. At the beginning of the Han and Yuan Dynasties, Kuang Heng went to court during the solar eclipse earthquake. The emperor was very satisfied with his words and moved Dr. Guanglu and the Prince of Shaofu. His suggestions were often adopted. However, the poet used to be a "near minister" and went to the palace several times, but he was repelled because of taboo, which was in sharp contrast with Kuang Heng. Liu Xiang in the Eastern Han Dynasty, Chao Xuanyuancheng III, was in charge of the five classics of the school and served as a secretary. When he became emperor, he served as a minister together with his son Liu Xin. When mourning for the emperor, Xin reinstated his father after the Five Classics, which played a great role in the spread of Confucianism. Compared with Kuang and Liu Zi, the poet deeply felt that fate had failed him. Many students who use tails are not cheap, which reflects their own development and is unsuccessful. The "Wuling" here refers to Chang 'an; "Light clothes and fat horses" refers to powerful people. This couplet is full of feelings about life, sadness and depression, such as crying. Bring out the fourth song.