What special role does the poet play in expressing the author's affection when he knows that there is no result, but he still keeps folding?

From the perspective of literary theory, the poet's expression is an implicit metaphor in literary techniques, and its significance lies in expressing a kind of mentality of "knowing that you can't do it" through words, thus setting off the author's extremely strong desire to express-in this poem, the poet's desire to express is to miss his mother.

In other words, the poet first pointed out that he knew it was meaningless to do so, and then at a turning point, he told everyone that even though he knew it was meaningless to do so, he still had to do it, thus well expressing the uncontrollable atmosphere and the emotion of missing his mother.

This technique is not only poetry, but also often used in characterization of other literary themes.

Of course, if you want to prepare for the exam and do the fill-in-the-blank questions that are limited by squares and have no practical significance, you can write like this:

The poet tried to pin his thoughts on his mother by folding paper boats.