How were the modern verses born out of the classical poetry

From The Trials written by Hu Shi, we can see that his classical verses in the vernacular had broken through th e forms of the classical poetry in the first chapter, and that his free verses i n the vernacular newly emerged from the womb of the classical poetry in the seco nd chapter. This article specifies and analyses the breakthroughs and their conn ections so as to show how the free verses evolved from the classical poetry.