Spring scenery in the two places is the same day, which makes people homesick!
The metaphor of "looking at flowers in front of the post station" is ingenious and full of associations.
At the center of the poem is the word "thinking". The whole poem closely follows the word "thinking" and unfolds at different levels. The first sentence "be a window willow", spread your thoughts in the boudoir; The second time, I used "flowers on the ground" to write my thoughts on post-travel. These two sentences convey feelings through images, which can be seen clearly without thinking. In three words, by going up one flight of stairs wrote the unforgettable acacia that turned from hope to disappointment on March 30th. However, it is still not straightforward, and only the words "Spring is over" are written, which is quite obscure. In four words, by going up one flight of stairs, the meaning turned into an explosion. The word "thinking" is straight, and it is very powerful to use the word "thinking" repeatedly and combine the first three sentences to point out the theme of the poem.