"Half-rolled red flags are near the Yishui River, and the heavy frost and cold drums can't make a sound." Why do war flags have to be rolled up half way?

When the author wrote this poem, he had not been to the battlefield. The scenery of the battlefield was just a figment of his imagination. The reason why the battle flag was half-rolled was because the water vapor beside Yishui was too heavy and the red flag had already It got wet, and because the temperature was so cold, the red flag was frozen, so it was folded and not unfolded.

1. Explanation of the poem

The city writes that the dangerous city will fight with blood, and the first two sentences will win. Wang Anshi of the Northern Song Dynasty expressed doubts. Why do dark clouds squeeze the city and illuminate the sun? Li He has more wilderness experience than Wang Anshi. Dark clouds and red sun contrast. Li He started the strange power of poetry in this era. He was only a teenager when he wrote this poem, and he didn't know which border war it was. Yanzhi: A red pigment used in women’s makeup. Yanzhi is concentrated to a purple color and is known to fight blood and purple soil near the Great Wall of Purple Soil. The Golden Platform was built by King Yan Zhao during the war. Jade Dragon points to the sword.

2. Li He’s early deeds

The young Li He never practiced martial arts and never saw war scenes. Instead, he wrote works about the Tang Dynasty. For Han Yu, Cen Shen and Gao Shi, this "Yanmen Taishou Xing" is enough to compare with Qu Yuan's "National Memorial". After a while, Han Yu jumped up. As soon as the guard slipped away, he ran to the door and invited a small man into the house. Li He was the first carbon fire after the Korean giant attacked the government. Han Yu didn't mind the two talking about his knees and added a charcoal grilled hand.

Through the above things, we can know that the author has not actually been on the battlefield. He only wrote this poem based on his hearsay and his own fantasy. Therefore, the red flag cannot be raised, which is a sign of failure. I imagined it based on the environment and weather of the battlefield, but even through imagination, I can use these to vividly show the coldness and cruelty of the battlefield.