1. The world is divided into three parts with a bright moon night.
2. The meaning of the three-thirds of the world on a moonlit night comes from the poem "Remembering Yangzhou" written by the poet Xu Ning of the Tang Dynasty: Xiao Niang's face is thin and it is difficult to shed tears, and her peach-leaf brows are easy to feel sad. One part of the world is a bright moonlit night, and the other two parts are Yangzhou.
3. "Remembering Yangzhou" is a poem of nostalgia, but the title does not clearly mention the memory of the person, but rather the place of nostalgia, recalling the farewell of that day with the lingering feelings of separation and hatred. The poet writes about the bright moon in Yangzhou, and uses the "bright moon" of "rascal" to decorate Yangzhou with infinite grace, which is consistent with the title and gives the poem an amazing artistic effect.