What are the characteristics of poetry in the Southern Dynasties?

One of the characteristics of poetry in the Southern Dynasties is that it pays more attention to form and skill. Pay attention to "official affairs" and "algae painting", and take rich allusions and gorgeous rhetoric as beauty. With the gradual rise of phonology, it pays more attention to the beauty of poetry, and finally puts forward one of the two sentences of "four tones and eight diseases" (eight diseases refer to: flat head, tail, bee waist, crane knee, big rhyme, small rhyme, side button and right button), with different weights (Song Shu? Xie Lingyun biography), called "Yongming (the title of Emperor Wu of Qi)". Coupled with the extreme corruption of the ruling class at this time, they used this gorgeous form to write their own dissolute life, which also produced the so-called "palace poetry." Liang Jianwen, Chen Houzhu, Xu Yi, Xu Ling and his son, Yu Jianwu and Yu Xin are all representatives of this school of poetry.