How to understand the sentence "When passers-by ask and wave far away, the fish will be too scared to be surprised" in Children Fishing?

The poem "Children Fishing" is about a clever and naughty child who learns to fish and meets a person asking for directions. The phrase "passers-by wave far away, and the fish won't be surprised" means that when someone asks for directions, the child waves to him far away, afraid to answer loudly, for fear of scaring off the fish in the water, the fish will not bite.

These two sentences mainly talk about children's expressions and psychological activities. He was worried that the fish would be frightened and swim away, so he quickly stopped passers-by from asking questions loudly, and he didn't dare to make a gesture himself. This shows that fishing children are very concerned about the results of their own fishing. They are smart, smart and alert. As a beginner of fishing, when passers-by ask for directions, he even thinks that his loud answer may surprise the fish, make the fish swim away and make his fishing fall short, which fully shows the intelligence and calculation of the children and is full of innocence. These two sentences are very vivid, which makes the image of a clever, cunning and serious fisherman jump from the paper and full of interest. This is also rare in Tang poetry.

This poem is mostly written in the vernacular, without many rhetorical devices, and it can't be called everyone in literary talent, but the good thing is that it describes the scene of children fishing and passers-by asking for directions vividly in plain and simple language, and depicts the clever and clever image of children so vividly. Especially in the last two sentences, by describing the children's actions, demeanor and psychological activities in response to passers-by, readers seem to see the fishing children in front of them.