Why is Li Shangyin the most accomplished poet in the late Tang Dynasty?

Li Shangyin (about 813-about 858) was the most accomplished poet in the late Tang Dynasty. The word Yishan was named Huosheng and Fan Nansheng, originally from Hanoi, Huaizhou, and later moved to Xingyang, Zhengzhou. History calls Li Shangyin "reciting books at the age of five. I'm seven years old. " Involved in the "Niu Li Party Struggle", with the gains and losses of the two parties ups and downs, it is impossible to display their talents. However, this miserable life also made a poet, which made him create a peak in the field of poetry that future generations could not reach. In his later years, the poet vaguely felt that the future of the Tang Dynasty was hopeless and his thoughts gradually collapsed. It was during this period that Li Shangyin created a large number of untitled poems and historical poems with hazy artistic conception, forming his own unique style. His works are included in the Collected Works of Li Yishan. Li Yishan's Collected Works, also known as Fan Nan's Collected Works, mainly includes Li Shangyin's poems.