In the North Korean academic community and some part of the South Korean academic community, the Han dynasty's annexation of the Korean peninsula have been denied. Proponents of this revisionist theory claim that the Four Commandaries of Han actually existed outside of the Korean peninsula, and place them somewhere in Liaodong Commandery, China instead. According to this theory, the Xuantu Commandery was said to be located in Shenyang. These hypotheses are "dictatorial" in the academic community of North Korea, which is supported by the amateur historical enthusiasts in South Korea, but this theory is not recognized at all in the academic circles of the United States, China and Japan.