Huilefeng: In the Tang Dynasty, there were Le Hui County and Lingzhou Branch, which were located in the southwest of Lingwu County, Ningxia Hui Autonomous Region. Lehuifeng is the highest peak in the area. The work Le Huifeng refers to the beacon tower near Le Hui County.
Source: Li Yi, a poet in the Tang Dynasty, listened to the flute on the wall of Shouxiang at night.
The sand is like snow before Yuefeng, and the moon outside the city is like frost. I don't know where the bleak reed flute blows and I look at my hometown all night.
The sand in front of Yuele Peak is as white as snow, and the moonlight outside the city is like autumn frost. I don't know where the bleak reed flute blows, and all people look at their hometown overnight.
This is a poem describing the homesickness of frontier soldiers, which depicts the strong homesickness and sadness of frontier soldiers (including pipers) from many angles.
The first two sentences of this poem describe the unique scene of a frontier illuminated by moonlight. From a distance, towering beacon towers stand on the winding hills for dozens of miles. Under the beacon tower is an endless desert, just like a snowy wasteland in the moonlight. Look closely, the moonlight outside the high city is bright, such as late autumn frost.
A desert is not a snowfield. The poet said it was "like snow", moonlight was not autumn frost, and the poet said it was "like frost". The poet's pen-shifting is to use this bleak scenery to render his sadness. It is this snow-like desert and frost-like moonlight that makes the night of surrender city seem particularly empty and desolate. It also makes the poet feel lonely in the frontier fortress and feel homesick.
If the first two sentences describe the scenery, then the scenery contains feelings, which are preserved but not released; Then the last two sentences are yes. In the silence, the night wind brought the sound of reeds. The flute reminds the poet: Which guard on the beacon tower pours out endless worries through the flute? How much homesickness has the plaintive flute touched?
In this long night of frontier fortress, they got up one by one with their clothes on, and their melancholy eyes swept through the snowy desert, such as the land of frosty moon, and they stared into the distance for a long time ..... "I don't know where" is about the poet's confused mood when he heard the flute on a moonlit night, reflecting the emptiness and loneliness of the night scene. "One Night" and "All Hope" also show the depth and urgency of the people's expectations for their hometown.
Baidu Encyclopedia —— Talking from Shouxiang wall listening to flute at night