That night, the black geese flew very high, and Khan quietly escaped during the night. I was about to lead the light cavalry to catch up when the snow fell full of bows and knives. There is a sentence or two "high in the dim moonlight, wild geese are soaring, and the Tatar chief is fleeing in the dark" to describe the enemy's rout. "The moon is dark and windy" and there is no light. "Goose flies high", there is no sound. Taking advantage of such a dark and silent night, the enemy quietly escaped. Khan was the supreme ruler of the ancient Huns, and here he refers to the supreme commander of the invaders. Running at night means that they have completely collapsed. Despite the cover of darkness, the enemy's actions were discovered by our army. Three or four sentences, "Let's pursue it, the horse will carry a heavy load, and the bow and sword will bear the snow", describe the situation that our army is preparing to pursue, and show the mighty spirit of the soldiers. Imagine a cavalry marching out, and suddenly the bow, arrow and knife are covered with heavy snow. What an exciting scene! Judging from this poem, Lu Lun is very good at capturing images and opportunities. He can not only grasp the typical image, but also show it at the most artistic moment. The poet doesn't write about how the army attacked, nor does he tell you whether he caught up with the enemy. He only described a scene he was going to pursue, which effectively set off the atmosphere and emotions at that time. "And we chase them, the horse is light and heavy, and the bow and sword are negative." This is not the climax of the battle, but the moment close to the climax. This moment, like an arrow on the string, will not send, the most attractive force. You may feel dissatisfied because you didn't give the result. But only in this way can it be more enlightening and arouse readers' association and imagination. This is called incoherent, and its meaning is endless. It's not without a tail when a dragon sees its head. The tail is even more interesting and charming if it looms in the clouds.