"When I asked your students under a pine tree", a question revealed the poet's admiration and hope. And that boy's "My Teacher", he answered "Going to Herb Collection" and answered what he thought, full of hope and suddenly fell into disappointment, with ups and downs of feelings, as if from boiling point to freezing point. Then the phrase "but to which corner of the mountain" gave birth to a glimmer of hope in disappointment: the hermit is not far away, and there may be the possibility of meeting. However, "through so many clouds, how can I tell?" What is puzzling is that the sea of clouds is far away. Where is the hermit? Questions and answers, ups and downs, twists and turns fully expressed the poet's inner waves. Finally, with the help of "how can I tell, through all these clouds?" Let readers look out, explore and chew ... From the misty picture, we can feel the poet's inner sense of loss and get our own feelings. Isn't this extremely vague and clear?
A short statement can have a long meaning, while a vague statement can leave a lasting impression. The so-called "vagueness" is just an "implicit" expression. In Notes for an Absent Person, the poet expressed vague images with clear verses, which is his painstaking pursuit, which may be an important reason why this poem has become an eternal legend.