The period of doubt in the history of the Korean Peninsula

The legend of Tan Jun and Korea first appeared in unofficial history's "The History of the Three Kingdoms" by Yiran, a Korean monk. According to his book, Shu Wei was quoted as saying: "For two thousand years, the altar king thrifty made Asda the capital of the founding of the country, and Korea at the same time." Legend has it that in 2333 BC, Xiong Huan and the son of "Bear Girl" Dan Gen established Asda ("Dawn Country"), the capital of Tan Jun and Korea, on the vast land between Liaohe River and Datong River, ruling the northern part of the Korean Peninsula and the southern part of the northeast of China today. About 400 years ago, he moved to Pyongyang, North Korea. This is only unofficial history's works in the late Korean Peninsula, and there is no record of Dangun in the official history of China.

Chen Guo is only recorded in ancient books in China, while Chen Guo is considered as the predecessor of the Three Kingdoms (Chen Han, Mahan and Han Ji). There are also views that Chen Guo is a tribe influenced by Jizi Korea in the south of the Korean Peninsula. At present, people know little about Chen Guo, and there are few records about Chen Guo in ancient books.

Jizi Korea was a political power established by Jizi in the northern part of the Korean Peninsula from the 2nd century BC to the 2nd century BC with local aborigines. According to Historical Records, Jizi Korea is said to have been built by Jizi, a adherent of Shang Dynasty. The Biography of Shangshu also said that Zhou Wuwang sealed Kiko in North Korea.

According to historical records, Wei Man, the general of Yan State, led immigrants into North Korea and became the prime minister of North Korea. The Wei regime was established in Pyongyang in BC 194, which overthrew the North Korean regime and was known as "Wei Man Korea" in history. In BC 109, Emperor Wu of the Han Dynasty attacked Korea from both land and sea, but both failed. He sent reinforcements by land and sea. In the summer of 108 BC, some ministers defected and surrendered, and the right canal king of Korea (the grandson of Wei Man) was killed, which led to the demise of Wei Man Korea. Emperor Wu of the Han Dynasty established Sihan County in Wei-Man Korea.