(1) Source: This sentence comes from the first sentence or two of Wang Changling's ancient poem Join the Army. The full text is as follows:
There is a dark snow-capped mountain in Qinghai, with long white clouds and a lonely city looking at Yumenguan.
Yellow sand wears golden armor in hundreds of battles, but the loulan is not returned.
(2) Clouds over Qinghai darkened the snow-capped mountains and looked at Yumenguan in the distance. Soldiers beyond the Great Wall have put on helmets and armor in many battles. If they can't capture Loulan City in the west, they will never come back.
(3) Appreciate:
The first two sentences mentioned three place names. Snow Mountain is Qilian Mountain in the south of Hexi Corridor. Qinghai and Guan Yu are apart from Wan Li, but they appear on the same picture, so there are different interpretations of these two sentences. Some people say that the first sentence is looking forward, and the next sentence is looking back at home. This is very strange. Qinghai and Snow Mountain are in front, and Yumenguan is behind. Then the hometown of the lyric hero should be the Western Regions west of Yumenguan, not the Han soldiers, but Hu Bing. On the other hand, the second sentence is an inverted sentence of "Looking at Yumenguan, an isolated city", and the object of looking at it is "the dark snow mountain in Qinghai". There are two misunderstandings here: one is to interpret "looking from afar" as "looking from afar", and the other is to misunderstand the general description of the northwest border region as what the lyric hero sees. The former misunderstanding is due to the latter misunderstanding.
Three or four sentences changed from environmental description with scenes to direct lyricism. "Yellow sand wears golden armor in hundreds of battles" is a poem with strong generalization. The length of the border defense, the frequency of wars, the hardship of fighting, the strength of the enemy and the desolation of the border are all summed up in these seven words. "Hundreds of battles" is more abstract, and the word "yellow sand" highlights the characteristics of the northwest battlefield, which reminds people of the scenes of "the medieval battlefield with sand clouds at dusk": "hundreds of battles" and "wearing golden armor", and it is even more conceivable that the battle was arduous and fierce, and it is also conceivable that there were a series of heroic sacrifices in this long time.