Why does Du Fu occupy a special position in the development of China's modernist poetry?

Although Du Fu was down and out all his life and died tragically, his contribution to China's poetry will always be praised by future generations. In the development of China's realistic poetry, Du Fu occupies a particularly important position. The Book of Songs is the beginning of China's realistic poetry. In the era of Du Fu, China's excellent tradition of realism was summarized and carried forward, reaching the peak of realism in ancient poetry. His realistic creative spirit directly guided the reform movement of Xinle poetry advocated by Bai Juyi in the middle Tang Dynasty, and has always influenced the Qing Dynasty. It is no wonder that Han Yu lamented that "I was born late and looked at each other from afar."