How to explain Zhengshi literature?

"Beginning" is the title of Wang Caofang (240-249), and the "beginning period of literary history" refers to the period from the late Cao Wei to Sima Shi to Jin Wei. At that time, Cao Wei Group and Sima Shi Group snared their own henchmen, expanded their power and fought for power and profit. The struggle is very cruel. Especially after Sima Group seized power, Cao Wei Group was massacred, which caused the darkest and scariest period of "few celebrities but all" in medieval history. The sinister struggle full of intrigue and usurpation, the pressure of terrorist politics and the influence of Laozi and Zhuangzi's thought make the content and style of Zhengshi's poetry show a completely different look from Jian 'an's poetry. Deep rational thinking and sharp life sorrow constitute the most basic characteristics of Zhengshi literature. The representatives of Zhengshi literature are "Seven Sages of Bamboo Forest", namely Ruan Ji, Ji Kang, Dan Tao, Xiang Xiu, Liu Ling, Ruan Xian and Wang Rong. The Seven Sages of Bamboo Forest are the product of Feng Xuan's prosperity. Talking about Feng Xuan promoted their friends, but their interests did not coincide. Ruan Ji pretended to be indifferent to the world, and Ji Kang was finally killed for openly not cooperating with Sima's family. These two men are the most important and representative writers in this period.