This is a poem describing a frontier soldier chasing the fleeing enemy on a snowy night. The main idea of ??the poem is: On a dark night, when the geese saw someone moving below, they did not dare to perch and flew very high. The invading enemy general took advantage of the darkness to escape secretly. Just as he was leading the light cavalry to pursue the enemy, it snowed heavily and the weather was freezing, making it more difficult to pursue the enemy. Although the soldiers' bows and knives were covered with snowflakes, they still pursued bravely despite the hardships.