How to evaluate the poetic attempt of Celan's life?

In terms of artistic achievements, Li Bai's Yuefu, Gexing and quatrains are the highest achievements. His songs completely broke all the inherent forms of poetry creation, with no one to rely on and many strokes, reaching the magical realm of vagaries and swaying. Li Bai's quatrains are natural and lively, elegant and chic, and can express endless feelings in concise and lively language. Among the poets in the prosperous Tang Dynasty, Wang Wei and Meng Haoran were good at the Five Wonders, while Wang Changling and others wrote the Seven Wonders well. Li Bai is the only person who combines the five wonders with the seven wonders. Du Fu's evaluation of Li Bai: "The pen is shaken by the wind and rain, and the poem makes the gods cry."