"Homesickness" has a special flavor:
The song of my hometown is the flute of Qingyuan/Thinking of Moonlight Night (Section 1)
These two sentences remind me of "looking up, I found it was moonlight, and then sinking, I suddenly remembered home." You can imagine how exciting this is.
The face of my hometown is a vague disappointment/like waving goodbye in the fog (section 2)
At first, my understanding of these two poems was naive and one-sided, and I didn't think too much about why the author said that "the face of my hometown is a vague disappointment". Later, after I got a comprehensive understanding of Xi Murong, I got a clearer understanding, and further realized that "vagueness" was due to the long separation time and became "helplessness" for various reasons. It is very helpful to understand the poet's situation.
After parting/homesickness is a tree without rings/never aging (section 3)
The last paragraph of the poem concentrates "homesickness" on a tree without rings, which fully expresses that "homesickness" will not be lost because of people's aging, but will always be fresh.