2. It is precisely because "I" walked from Jiangnan to the woman's place and didn't go in, the woman's expectation of "looking like a flower" became disheartened. The last two sentences should have been "I'm not a passer-by, just a passer-by", so "my horseshoe is a beautiful mistake". Here the poet used a small inversion sentence. This arrangement has created an uneven level of structure, which is more poetic and shines brightly in disharmony. Another touching feature of this poem is the beauty of its language, especially the number of "beautiful mistakes". This sentence is inherently contradictory. The horseshoe of Dada sings the deep heart of women's hope for reunion, so it is beautiful. However, the horseshoe just passed in front and didn't stop for her expectation. This is a mistake.
Your heart is like a small lonely city.
Your heart is a small closed window.
It expresses the ardent expectation of a boudoir woman for a noble person, but the infatuation of a woman has brought a long and boring wait and expressed the sadness of a woman.
4. "Error" ending with ellipsis also gives people a meaningful feeling, which also means that women should continue to wait and be disappointed, and so on.