What are the similarities and differences between mid-Tang poetry and prosperous Tang poetry?

Poetry in the early Tang Dynasty This is the preparation period for the prosperity of Tang poetry. Important poets are Yang Jiong, Lu, Luo, Shen Quanqi and Song, who are called "four outstanding poets in the early Tang Dynasty". Poetry in the early days of the founding of the People's Republic of China in the Tang Dynasty still developed along the inertia of poetry in the Southern Dynasties, which was soft, delicate and lifeless. The emergence of the "four masters" began to change this trend. They are brilliant, dissatisfied with the status quo, expressing indignation and heroic embrace through their own poems, and broadening the theme of poetry. From the prosperous Tang Dynasty to the early 8th century, the so-called "Kaiyuan Shi Sheng" appeared in the Tang Dynasty, and its economy and culture reached its peak. There are also a large number of outstanding poets in the field of poetry creation, who have written extremely rich poems. Among them, pastoral landscape poems and poems describing frontier wars accounted for a considerable proportion, and Li Bai and Du Fu also appeared at this time. Poetry 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 folk sufferings in the decline of the Tang Dynasty empire from different angles, and their artistic achievements are very high, which have a great influence on future generations. Han Yu is a great prose writer and a famous poet. He worships Li and Du most, but he does not imitate them step by step, but creates a unique style through his own exploration. Korean poetry is characterized by seeking novelty and avoiding vulgarity. Together with his good friend Meng Jiao, it is called "Han Meng Poetry School". Introduction to Tang Poetry The Tang Dynasty was the golden age in the history of China's poetry, and all kinds of poems were fully mature. In the past 300 years, there have been many talented poets, many works, a wide range of themes, various forms and different styles; Poetic and picturesque, a hundred flowers blossom. (1) The representative writers in the early Tang Dynasty-the preparatory period were "four outstanding writers in the early Tang Dynasty"-Wang Bo, Yang Jiong, Lu, Luo; In addition, there is Chen Ziang. (2) In the prosperous Tang Dynasty, the economy was prosperous and the national strength was strong, and the Tang poetry reached its peak, with a wide range of themes and numerous schools, and the "Frontier Poetry School" and "Pastoral Poetry School" appeared. The great romantic poet Li Bai and the great realistic poet Du Fu are the most outstanding representatives of this period. Their poems are the highest in this generation. In their works, no matter the five laws and seven laws, the poems and ancient songs with five unique skills and seven unique skills have achieved high artistic achievements, as Han Yu said, "Du Li's articles are endless." For example, Li Bai's "Climbing Mount Tianmu in a Dream" and "Into the Wine"; Du Fu's Three Officials and Three Farewells and so on. (3) Mid-Tang Dynasty and Late Tang Dynasty-Development and Maturity In the middle and late Tang Dynasty, poets made their own achievements. But the most outstanding achievement is Bai Juyi, who put forward the progressive theory that "articles should be written in time, songs and poems should be written for things" and personally participated in and led the "New Yuefu Movement". Bai Juyi's poems are clear and easy to understand, and are deeply loved by the masses. His representative works include Song of Eternal Sorrow and Pipa Travel. Other famous poets in the middle and late Tang Dynasty were Wei, Liu Changqing, Han Yu, Meng Jiao, Liu Zongyuan, Li He, Li Shangyin and Du Mu.