Why send three thousands of feet sad like a long poem?

The original sentence of Qiupu Song is "three thousands of feet with white hair, and sorrow is like a beard". The following is the original text and explanation of the poem:

First, the original text: white hair and three thousands of feet, sorrow is like a long beard. I don't know where to get autumn frost in the mirror.

Second, white hair as long as three thousands of feet, because of sadness. Somewhere in the mirror, autumn frost falls on my head.

Appreciation: This poem is the most widely circulated among Li Bai's poems. Just looking at the sentence "Three thousands of feet with White Hair" makes people unable to understand the exaggerated length of white hair. After reading the next sentence, I suddenly understand that white hair is born of sadness and grows because of sadness. Worrying about white hair grows three thousands of feet. How many deep worries should there be? There are many sad examples in classical poetry. Li Bai found a new way. People will not be offended by the irrationality of poets. On the contrary, they will sincerely appreciate this unnatural and popular strange sentence and feel that the poet's sigh is really sympathetic.

Autumn frost three or four sentences refer to white hair, which seems to be repetitive and non-repetitive. It has a sad and haggard emotional color, which is beyond the reach of white-haired characters. These two sentences are not questions, but angry words and bitter words. Poetic eyes fixed on a word in the next sentence. The word goes straight to the exclusion and oppression suffered by the poet for half his life, and his ambition has not been realized. Therefore, he is worried that he will be white-haired, eat autumn frost and experience his personal feelings. Why don't you know? This whimsical sentence has been passed down through the ages, and it can be said that it is good at complaining.

The background of Qiu Pu's song creation

Qiupu, Chizhou County in Tang Dynasty, named after Qiupu water, was one of the producing areas of silver and copper in Tang Dynasty. Li Bai visited Qiupu three times in his life, leaving more than 70 excellent works. Seventeen poems of "Qiupu Song Group" were circulated, which were written during the second visit to Qiupu in Tianbao 13th year. At that time, Li Bai had left Chang 'an for ten years because of being left out in the cold.

During these ten years, Li Baiyun traveled all over the world, taking the four seas as his home, from Zhao Yan in the north to Jianghuai in the south, and had a lot of happy hours, especially with Du Fu, traveling in Liang and Song Dynasties and discussing poetry with wine. However, I am not in a good mood in Qiupu. In the 12th year of Tianbao, I traveled to the north to see the powerful forces of An Lushan and the monarch's ruby. At this time, I visited Jiangnan again with great sadness and indignation.