What are the characteristics of the poems of the seven sages of bamboo forest?

During the Wei and Jin Dynasties, there was a bloody battle between Sima and Cao Zhi, especially Sima killed people with "Ming Jiao", and the politics was extremely dark. As the times require, Ruan Ji and Ji Kang are the seven sages of bamboo forest. Later, they were called "Zhengshi (the title of King Wei Qi, 24 1 ~ 249) poets". They "let nature take its course" (Ji Kang's explanation of private affairs) and "not Tang Wu but Bo". They also care about reality, but the dark politics forces them to change from hard work to cynicism or passive seclusion; They are also full of feelings, but the precarious situation forces them to change from impassioned to obscure and tortuous, or open-minded. Ruan Ji (2 10 ~ 263) composed 82 poems of "Yong Huai", which can be regarded as the representative works of Zhengshi poets. These poems are all written as "far-reaching purpose and hard to find interest" (Volume 4 of Selected Comments on Wang Fuzhi's Ancient Poems).