What is Guan in Li Bai's Guan Shanyue? Where did he see this scene?

Yumenguan: Located in the northwest of Dunhuang City, Gansu Province, it is the main road leading to the western regions in ancient times. Autumn wind blows from the west and blows through Yumen Pass.

Guan Shanyue is a five-character ancient poem written by Li Bai, a great poet in the Tang Dynasty, with Yuefu as the old theme. This poem is about the mutual thoughts of frontier fortress soldiers who are far away from home and their wives at home, and profoundly reflects the pain brought to the general public by the war. The whole poem is divided into three layers. The first four sentences mainly describe the vast frontier picture composed of three factors: Guan, Shan and Yue, and express the homesickness of the people who participated in the war. The middle four sentences specifically describe the war scenes, and the battlefield is fierce and cruel; The last four sentences are written to ask people to look at the edge of the land and miss their hometown, and then infer that their wives sigh at the tall buildings in the moonlight. This poem is like a frontier scroll, which consists of three parts: the bright moon in the mountains, the sadness of the battlefield and homesickness for the guests. It runs through the whole poem with resentment, uniform color, seamless, vigorous and natural style.

Original text:

Guan Shanyue

A bright moon rises from Qilian Mountain and crosses the vast sea of clouds.

The mighty wind blew Wan Li and crossed Yumen Pass.

At that time, Han soldiers pointed at the mountain road, and Tubo coveted the vast territory of Qinghai.

This is a land of wars in past dynasties, and few soldiers can survive.

The soldiers turned and looked at the border, thinking of home with longing eyes.

The soldier's wife looked at the tower and lamented when she would see her relatives far away.

Translation:

A bright moon rises from Qilian Mountain and crosses the vast sea of clouds.

The mighty long wind blew through Yumen Pass where Wan Li and the soldiers were stationed.

In those days, Han soldiers pointed to Deng Bai Mountain Road, and Tubo coveted a large area of rivers and mountains in Qinghai.

This is the place where military strategists fought in the past dynasties, and few survived.

Garrison soldiers looked at the border town from a distance, and they couldn't help looking sad when they missed their hometown.

At this time, the wives of the soldiers are in the tall building, sighing when they can see their relatives in the distance.