Du Fu's poem "The rice is fat and the corn is white, and the public and private granaries are rich" reflects the prosperous scene during the Xuanzong period of the Tang Dynasty, that is, the prosperity of Kaiyuan. After Emperor Xuanzong succeeded to the throne, he appointed Yao Chong and others as prime ministers, attached importance to local bureaucrats, delegated outstanding central officials to local posts, personally assessed the county magistrate's achievements, and paid attention to thrift. These reform measures have brought about new changes in the political situation in Kaiyuan. In the early years of Emperor Xuanzong of Tang Dynasty, politics was clear.