A boat ticket means missing the mainland.
Memories of mother's death
The two sides of the Taiwan Strait look forward to the reunification of the motherland. It is a clever way for poets to express their nostalgia for their motherland and hometown with poems. The author compares homesickness with stamps, boat tickets, tombs and straits according to the changes of time and space, and takes this as a carrier to turn heavy and abstract homesickness into tangible things, which is easy to understand. The four carriers themselves are the representatives of homesickness and the deepening of the author's feelings, which further enhances homesickness.