What is the expressive effect of the last two sentences of Miscellaneous Poems with questions?

When you passed my window, did the plum blossom bloom its first cold flower? ? This question confused the other party and asked about things rather than personnel. Is the plum blossom in bloom at this moment? Presumably, readers are also surprised by this. But this is the question, which is very interesting and memorable. In fact, the poet's real purpose is where the plum blossom is. I don't know where to start with what the poet wants to say and ask, but his homesickness lies in this casual question. This is a blank left by the poet to the reader's imagination.

A person's nostalgia for his hometown is always associated with people, events and things closely related to his previous life. The so-called "homesickness" is completely a kind of "thinking in images", and all the people who are homesick come up with concrete images or pictures. Old friends in my hometown, mountains and rivers, local conditions and customs are all worth remembering. However, it is often some seemingly ordinary trivial events, which cause cordial nostalgia, such as Han Mei at this window. It may contain intimate and interesting events in family life in those days. Therefore, this cold plum is no longer an ordinary natural thing, but a symbol of hometown. It's poetic and typical. So this cold plum naturally became the concentrated sustenance of my homesickness. In this sense, asking "the first cold flower that blooms it" is completely in line with the logic of life. One person.