Guan Shanyue is a five-character ancient poem written by Li Bai with Yuefu as the old theme. This poem mainly describes the feelings of missing each other between frontier soldiers and their wives at home. The feeling of leaving people and thinking about women have always been one of the topics that poets are keen on. It's just that the realm written by ordinary poets is very narrow and too sad. Li Bai's poem, however, opened the realm from the beginning, and its momentum was powerful enough to shock the world, the past and the present.
First of all, the first four sentences of the poem "The bright moon rises from the mountain of heaven, in the boundless haze of the sea of clouds." For thousands of miles, the wind blows the Yumen Pass. "Li Bai painted a magnificent and open frontier fortress picture, including three images of Guan, Shan and Yue. That is, a bright moon rises from Qilian Mountain and crosses the vast sea of clouds. The mighty Changfeng blows through Wan Li until the Yumen Gate where soldiers are stationed.
The last four sentences are the frontier fortress pictures described in the first four sentences, in which soldiers guarding the frontier are on the battlefield. Here Li Bai used the allusions of Liu Bang, the Emperor Gaozu. That is, as recorded in Biography of Han Xiongnu, Liu Bang was besieged by Xiongnu in Deng Bai for seven days. "Green Bay" is the place where Tang Jun and Tubo fought for years. Whether it was the Han army in those days or Tang Jun now, almost none of them survived the battle and returned to their hometown.