The Research of the Importance of the Great Preface to the Book of Odes in Poetry Theory from the Pre-Qin to Han Dynasty

The Great preface to the Book of Odes summarized the pre-Qin to Han Dynasty's research on the book of poetry,and it may be seemed as the first monograph of the poerty theory in that period.The contents of Big Foreword of Poem can be divided into three aspects: one is the theory of Feng Hua,the second is the theory of Shi Yan Zhi,the third is the theory of Liu Yi.These three spots have manifested the polarization of the Han Dynasty's poetry idea.