What is the reason why Huang Tingjian had an important influence in the Song Dynasty? What are the characteristics of his poetry theory and creation?

There are several reasons why Huang Tingjian can occupy an important position in the poetry circle of the Song Dynasty and have a wide influence:

First, because he put forward a unique theory of poetry creation;

Second, because of his own achievements in poetry;

Thirdly, under his influence, a huge school of Jiangxi poetry was formed.