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 yet returned.
But the flying generals of Dragon City are here, and Huma is not taught to cross the Yin Mountains.
"But the flying generals of Dragon City are still there, and they will not teach Huma to cross the Yin Mountains" means: If the flying general Li Guang of Dragon City is still there, the Huns will never be allowed to go south to herd. The horse surpasses the Yin Mountain.