In a Swifiian artistic imagination, Ursula Le Guin's The Changing Planes fabricates two stories about the extreme pros- thesis through the generic engineering, and represents "the technological bodies" in contemporary techno-scientific context. Through the tragedy of genetic modification, the stories demonstrate that genetic technology may subvert "the essence of man" and cause the ir- reparable post-human suffering when it is used to reach man's intelligent and cognitive breakthrough. This essay traces the criticism of posthuman ideology...