What expression is used in the poem Fisherman on the River? What is the expressive effect?

This poem, with simple language, vivid image, strong contrast and thought-provoking, reflects the hardships of fishermen's work and arouses people's attention to the sufferings of people's livelihood. This article describes the hardships of life and labor. It is pointed out that people who come and go drinking and having fun on the river only know the delicious taste of perch, but they don't know and don't want to know the hardships of fishermen fighting against the stormy waves. The first sentence is about people coming and going on the river bank, which is very lively. The second sentence describes the mentality of people on the shore and reveals the reasons for "communication". The line of sight passed by the last two sentences indicates the fishing boat flickering in the wind and waves, and pay attention to the fishing scene. Although the perch is delicious, it is hard to catch it, which expresses the poet's sympathy for the fisherman's sufferings and deeply exhorts the shore people who love the beauty of perch. The contrast between the two environments of "River" and "Storm", the two modes of "coming and going" and "leaf boat", and the two dynamics of "coming and going" shows the purpose of the whole poem. [1] Creative background Fan Zhongyan is a politician who advocates innovation. In the Northern Song Dynasty, Renzong served as a political adviser and presided over the political reform. He was able to care about the sufferings of ordinary people living in the lower classes of society and wrote some poems sympathetic to the working people, but few of them have been handed down. Jiangnan water town is full of rivers and rivers, which is very rich in fish and shrimp. Among them, Jiangsu Songjiang four-cheeked bass is the most famous. There is no one who doesn't like this specialty and doesn't want to taste this delicious food. Fan Zhongyan, a native of Wuxian County, Jiangsu Province, grew up on the edge of Songjiang. I know this situation very well. However, he wrote it in poetry, but he didn't just pay attention to the delicious taste and admiration of perch, but noticed something more noteworthy. I noticed the pain and dangers of fishermen hidden behind this specialty and expressed deep sympathy.