Also, this poem uses "stamps" to express the memory of mother, and uses "graves" to express the memory of mother, which is a deep affection; It is a kind of warm love to express my thoughts on my new wife with a "boat ticket"; The Straits expresses the poet's nostalgia for his hometown and motherland, which is a deep patriotic feeling. These groups of images constitute the rich connotation of homesickness and make it more obvious. Feelings are getting stronger and stronger, and the theme is getting deeper and deeper.
The author uses this structural form, like the repetition of the main theme in music, to repeat the pain of separation in one chant and three sighs, and to render homesickness to the fullest. So critics say this poem is full of structural beauty and musical beauty.