This paper explains the meanings of “Original Change of Classic Poetry” and “the Simple and Ornate Change with the Times”, on the basis of which it compares and analyzes the significance of the literary theory.

LIU Lv,who lived in the early period of the Ming Dynasty but was an adherent of the Yuan Dynasty that had died out,compiled "Wing of Polite Letters"(a book talking about poems and poem techniques) in which he selected poems composed by XIE Ling-yun from Poetry Collection.

About my comprehension of "the voice of Zhengshi",and the meaning of "the voice of Zhengshi" in CHEN Zi-ang s "the preface or the chapter slim bamboo" is a phrase mean "poem of classic elegance",and CAO Pi s leading figures of the literary circles in the Jian an period,I still insist my original viewpoint,and do detailed argument.