In the ninth year of Emperor Wen of Sui Dynasty (589), China was reunified after more than 28 years of war. The chaos in the late Sui Dynasty was severely divided, and it was established in the Tang Dynasty after nine years of unified war. Therefore, historians often call "Sui and Tang Dynasties". During these three hundred years, the feudal society in China has been greatly developed.
At its peak, the Sui Dynasty reached Liaoning in the northeast, Taklimakan Desert in Xinjiang in the west, the East China Sea in the east and northern Vietnam in the south. In the heyday of the Tang Dynasty, it reached the northern and outer Xing 'an Mountains of Lake Baikal in the north, the Aral Sea in Central Asia in the west, Sakhalin Island in the east and northern Vietnam in the south.
poetry was the most developed literary achievement in the Tang dynasty. The Complete Poems of Tang Dynasty compiled by Qing Dynasty contains more than 48,9 poems by more than 2,2 poets, and this poet Li Bai is not all. The poets in the early Tang Dynasty are most famous for their "four outstanding poets in the early Tang Dynasty" (Wang Bo, Yang Jiong, Lu Zhaolin and Luo Binwang). Poets in the prosperous Tang Dynasty can be divided into pastoral schools represented by Wang Wei and Meng Haoran and frontier schools represented by Cen Can and Wang Changling. Among them, Li Bai, a poet, and Du Fu, a poet saint, are the most famous. Bai Juyi was the most outstanding poet in the middle Tang Dynasty, and his poems were easy to understand. In addition, there are Yuan Zhen, Han Yu, Liu Zongyuan, Liu Yuxi and Li He. Li Shangyin and Du Mu are the most outstanding poets in the late Tang Dynasty, and they are called "Little Li Du". Although there were still outstanding poets in the later Song, Ming and Qing Dynasties, their overall level was not as good as that of the Tang Dynasty, and Tang poetry became the insurmountable peak of China's ancient poetry.