The whole poem is as follows: people come and go on the river, but they love the beauty of perch. Look at those poor fishermen, floating up and down in the big waves and rocking in the boats.
Literally: People coming and going on the river only like delicious perch. Look, the fisherman is driving a flat boat, going in and out in the wind and waves.
Appreciation of the whole poem:
The first sentence is about people coming and going on the river bank, bustling and very lively. Naturally leads to the second sentence. It turns out that the purpose of people coming and going by the river is "but love the beauty of perch". But love is only love. Perch has a flat and narrow body, a large head and thin scales, and is delicious. People gathered at the river in order to get there first. But no one knows that it is not easy to catch bass, and no one has observed the hardships of fishermen. The world only loves the delicious perch, but does not pity the fishermen's hard work, which is unfair in the world.
So in three or four sentences, the author constructs a vivid picture to reflect the hard work of fishermen on the river. A leaf boat, lingering in the wind and rain, is really "life is at stake, and the weather is unpredictable." The poet didn't make it clear why the fisherman had to take such a risk, so he came to an abrupt end, and readers could already understand the author's implication. This is: fishermen are completely forced by life, and the beauty of perch is bought by fishermen's suffering. This inexhaustible technique makes this poem meaningful and memorable.
This poem is full of the poet's concern and sympathy for fishermen sailing in rough waves, and also expresses the poet's advice to people who only love the beauty of perch on the river.