The poem describes the flatness and vastness of the desert and the long river, thus depicting a magnificent scenery of nature beyond the Great Wall. The magic of its seiko lies in the high artistic generalization of the space in the vast area beyond the Great Wall: the words "desert" and "long river" are vigorous and vigorous, which are a lot of smears, summarizing these two natural images so truly, naturally, accurately and vividly; And succinctly and skillfully make them complement each other and complement each other. It is because of the "desert" that the "river" is long; It is precisely because of the length of the river that the desert is great. The words "big" and "long" are extraordinary in the ordinary, like hit the floor with iron pillars.

Then "Lonely Smoke Straight" and "Wild Goose" made a unique image description of "desert" and "long river" respectively. This is a general description, exaggerated and realistic. Why is the "desert" so big? Why is "Long River" so long? Because the desert is vast and boundless, the smoke in front of you makes people feel straight. But in fact, the poet did not write the beacon smoke for the sake of writing it, but set off the "big" desert through "solitary smoke"; Without "solitary smoke", "desert" is indescribable. As for the "falling yen" in "Long River", the effect is similar, but different. If the "long river" does not have a "falling yen", its function is only a cushion for the "desert", and it is impossible to form a vast and magnificent picture of the Great Wall with the desert. It is precisely because of the "falling yen" that the image of "long river" is so magnificent and complements the "desert".