Literature Reference: 梦见离珠浦，书来在桂州。—— 《横吹曲辞 望行人》 Dreaming of leaving Zhupu, a letter arrives from Guizhou. Source from 'Hengchui Quci: Wang Xingren'.
书: Books, repositories of knowledge, embody wisdom. They express art and literature, convey profound thoughts, facilitate emotional expression, and are adorned with literary elegance.
来: In the future, to and fro. Often used as a filler word in poetry and lyrics; the future, what is yet to come, tracing back to its origins.
Meaning: The arrival of a letter symbolizes longing and anticipation.