Going out of the fortress (Wang Changling of the Tang Dynasty)
The bright moon of the Qin Dynasty and the Pass of the Han Dynasty, the people who marched thousands of miles have not returned.
Interpretation: Look at the bright moon in the sky, it is still the bright moon of the Qin Dynasty; look at the majestic Guancheng, it is still the national defense building of the Han Dynasty. It makes readers naturally connect the border pass under the bright moon with the long history of the Qin Dynasty's building of the border to prepare for the Hu, and the Han Dynasty's series of wars with the Hu people inside and outside the pass!
But the flying generals of Dragon City are not only Teach Huma how to cross the Yin Mountains.
Explanation: As long as Li Guang, the flying army of Dragon City, is stationed, the enemy's war horses will not be able to cross Yinshan.