The method of Duohuan(奪換), that is, the method of changing the bones and altering the fetus, is an important topic in the poetics of the Song Dynasty. Since Huang Tingjian(黃庭堅) proposed it, it has been used in the creation of poetry in the past dynasties. The method of changing the bones and altering the fetus, especially from Tang poetry, has become a relatively popular creative method. Korean poets are very concerned about this. In their reading, they could find the poems of the Tang Dynasty replacing the six dynasties, and put forward special mentions, even there are some places that Chinese scholars had not noticed. They also found lots of examples of later generations changing and altering the before, compared and evaluated them, and tried to find out the author’s personality and differences, so as to provide a reference for the current writing. Korean poets not only noticed the facts before and after Tang and Song poets were changed and altered, but also noticed how to change and alter Tang poetry in their own creations. There are many cases of Korean poets taking over and replacing Tang poetry in the process of creation. Changing and altering Tang poetry is an important way for them to learn Tang poetry. Some great poets in the Tang Dynasty, such as Li Bai(李白), Du Fu(杜甫),...