What's the difference between the prosperous Tang Dynasty and the middle Tang Dynasty?

The difference between poems in the prosperous Tang Dynasty and those in the middle Tang Dynasty;

The strong ideal color and juvenile feelings in Tang poetry. Poetry in the prosperous Tang Dynasty is divided into pastoral poetry school and frontier poetry school. The pastoral school of landscape poetry is headed by Wang Wei and Meng Haoran. "There are paintings in poems and poems in paintings"; Frontier poets include Gao Shi and Cen Can, also known as Gao Cen. There are also romantic poetry schools headed by Li Bai.

Meteorology in the prosperous Tang Dynasty is a special term for literary criticism in the Song, Yuan, Ming and Qing Dynasties, which refers to the overall style of poetry in the prosperous Tang Dynasty. In Song Dynasty, Yan Yu's Cang Hua and other works spoke highly of the poems in the prosperous Tang Dynasty, pointing out that the poems in the prosperous Tang Dynasty were characterized by "vigorous brushwork and vigorous weather" (Letter to his stepuncle Lin 'an), and expounded this in his poems. Later, according to Cheng, a poetic theorist in the Ming and Qing Dynasties, vigorous and vigorous (sometimes called vigorous) is often regarded as the style and style of poetry in the prosperous Tang Dynasty, and it is called the weather in the prosperous Tang Dynasty.

In the middle and late Tang dynasty, the heyday of the dynasty has passed, but poetry creation has not declined. Outstanding poets with different styles have emerged, such as Han Yu, Liu Zongyuan, Zhang Ji, Li He, Bai Juyi, Yuan Zhen, Liu Yuxi, Du Mu, Li Shangyin, Wen and Du Xunhe. Their poems reflect the crisis and the sufferings of the people in the declining period of the Tang Dynasty from different angles. The pursuit of realm, the conscious tempering of words and expressions, and the existence of different poetic streams and groups of poets with similar aesthetic tastes and theoretical claims show the efforts to expand the new art field of poetry. Du Fu is a great poet who links the past with the future.