The two sentences "The yellow sand will wear the golden armor in a hundred battles, and the Loulan will never be returned until it is destroyed", which expresses and describes the combat life and ambition of the border guards in a concentrated manner. This means that in the desolate desert, there are many battles, and the soldiers have gone through hundreds of battles, and even the iron helmets and armor on their bodies are worn out, but as long as the border troubles have not been eliminated, they will never disarm and return home. The main enemies in the West during the Tang Dynasty were Tibet and the Turks. The shores of Qinghai Lake were the frontline of border defense where the Tang Dynasty government troops and the Tubo aristocratic armies fought many times and fought fiercely; while the Yumen Pass area faced the Turks to the west, and this area was also constantly at war with fierce battles for years. "Yellow sand wears golden armor in a hundred battles" is a powerful summary of this kind of fighting life. This is a very powerful verse. The long time of guarding the border, the frequency of battles, the arduousness of the battles, the strength of the enemy troops, and the desolation of the border areas are all summarized in these seven words. Among them, the word "yellow sand" is a real scene, which exaggerates the typical environment of the frontier battlefield, and also expresses the desolation and desolation of the border court; the word "hundred battles" vividly illustrates the long time that soldiers guard the border and the frontier battles. The frequency of battles; and the words "wearing golden armor" exaggerate the difficulty and fierceness of the battle, and also illustrate the heavy price the soldiers paid and even sacrificed to protect their homeland and country. However, the golden armor is fragile and life can be thrown away, but the will of the border guards to serve the country will not diminish. "Unless Loulan is broken, it will never be returned" is a direct expression of their inner passion. The allusion of Loulan is used here. The King of Loulan in the Han Dynasty colluded with the Xiongnu and repeatedly intercepted and killed the envoys of the Han Dynasty on their missions to the Western Regions. In 77 BC, General Huo Guang sent Pingyue supervisor Fu Jiezi to Loulan. He outsmarted the king of Loulan and returned victorious, removing an obstacle on the Silk Road. This refers to the people in power of the Tubo and Turkic aristocrats. The soldiers written in the poem did not have the war-weariness of being longing for war. In order to defend the security of their homeland, they ignored their personal interests and resolutely stated that they would continue to fight to the end in the face of a powerful enemy. "Unless the Loulan is destroyed, it will never be returned." These seven sonorous and powerful words have successfully created a group of heroes who are not afraid of hardships, sacrifices and magnificent souls, making people feel the vastness of the poem and the tragic feelings. The first two and two sentences have a broad realm, tragic feelings, and rich implications; there is a turning point between the third and fourth sentences, and the two sentences form a sharp contrast. Although the "yellow sand" sentence describes the hardships of war, the actual feeling of the whole image is majestic and powerful, rather than low and sad. Therefore, the last sentence is not a lament that there will be no day to return home, but a firmer and deeper vow based on a deep awareness of the hardship and long-term nature of the war.