The creative style of "Seven Scholars of Jian 'an" embodies the era style of Jian 'an literature. Why do you call it?

The poems of the seven sons of Jian 'an are mainly five words. They have their own characteristics in creation, but they also have some similar styles: the content profoundly reflects the chaos of the times, the artistic expression is sad and generous, vigorous and powerful, and the content and form have reached a perfect combination. Later generations, because of their creative style, embodied the era style of Jian 'an literature, which was called Jian 'an style. In the Ming Dynasty, Zhang Qian compiled Confucius' Shaofu Collection, Wang Shizhong Collection, Chen Jishi Collection, Ruan Collection, Liu Collection and Yingde Lianxiulian Collection, which were collected in 103 books in the Han, Wei and Six Dynasties. In Qing Dynasty, Yang compiled Seven Chapters of Jian 'an.