The poet starts with the scenery, and the first sentence outlines a desolate scene of Leng Yue's filming the border crossing. "The Moon of Qin Dynasty was broken in Han Dynasty" cannot be understood as the Moon of Qin Dynasty was broken in Han Dynasty. Here, Qin, Han, Guan and Yue are used alternately, which is called intertextuality in rhetoric, meaning bright moon in Qin and Han dynasties and Guan in Qin and Han dynasties. The poet hinted that the war here has never stopped since Qin and Han Dynasties, and it has been a long time. The second sentence "The Long March has not yet returned" and "Wan Li" mean that the frontier fortress and the mainland are far from Wan Li. Although it is empty, it highlights the vastness of space. The Return of Man reminds people of the disaster brought by the war and expresses the poet's grief and indignation.
How can we get rid of people's difficulties? The poet pinned his hopes on a brilliant general. "But make Longcheng fly, and don't teach Huma to cross the Yinshan Mountain." As long as Li Guang, the flying general guarding Liuzhou, is still alive, he won't let the Hu people's cavalry cross the Yinshan Mountain. "Dragon City Flying General Army" refers to Li Guang, a famous soldier who was guarding Lulong City by Emperor Wu of the Han Dynasty. He was brave and good at fighting, and defeated Xiongnu many times. "Don't teach" is not allowed, and the word "teach" is pronounced flat; "Huma" here refers to the cavalry invaded by foreign countries. "crossing Yinshan", crossing Yinshan. Yinshan Mountain is a big mountain range in the east-west direction in the north, and it is the natural barrier of the northern border defense in Han Dynasty. The last two sentences are written implicitly and skillfully, which makes people draw the necessary conclusions by comparing the past.
This poem is called the masterpiece of the Tang Dynasty. Tragic but not sad, generous but not shallow, Wang's poem "Out of the Fortress" is two, and this poem is the first.