The Simple Analysis about the Reason Why the Song Poem lost it's Musical Character

On the early time of the poem born in our country,it has the close relation about the music.But the YongMingTi which appeared in the Qiliang period made the poem leaving the outside music and developed by itself.After the stage of shengshi in tang dynasty,the poem almost lost it(s musical character in song dynasty,and became a pure literary form.This article is intend to study from two verses——the poem and the music——and in outer to investigate the reason why the song poem lost it(s musical character in the changing from tang dynasty to song dynasty.