What does Du Weizi mean in Zhang Sheng's A Thousand Miles from Home?

A: Du refers to Du Mu, a poet in the Tang Dynasty.

Du Mu said in "Appreciating Zhang Hu and Chu Shi to Send Long Sentences and Four Rhymes":

Who is the public image in the seven-poem? It must be commanded by Cao Liu.

Recommend the scale in the past, and no one will be Kuai Tong when begging fire.

The North Pole Tower hangs a dream, and the Xijiang waves swallow it away.

Poor, thousands of miles away from home, singing for nothing.

"Seven children's theory of poetry who is like a man? Cao Liu must be in command. " Meaning: In terms of poetry, the seven sons of Jian 'an can't compare with you, and Cao Zhi and Serina Liu still have to listen to you. It is extremely high. "Poor family is thousands of miles away, and it is full of six rooms." It is Du Mu who complains about his downfall. As the poet Zheng Gu said, "Du should be the only one who knows' a thousand miles away from home'."