Literature Reference: 缄书待还使，泪尽白云天。—— 《相和歌辞 王昭君》 作者：上官仪 Awaiting the messenger with a sealed letter, tears are spent under the vast white sky. Source from 'Xianghe Geci: Wang Zhaojun' by Shangguan Yi.
书: Books, repositories of knowledge, embody wisdom. They express art and literature, convey profound thoughts, facilitate emotional expression, and are adorned with literary elegance.
还: To strike back and return home. In names, it often signifies achieving great success and returning to one's hometown in glory.
Meaning: The return of a letter symbolizes the emotions of waiting and longing.