From the second year of Yuanfeng (BC 109) to the third year of Yuanfeng (BC 108), Emperor Wu sent troops to occupy Wei Man Korea, and set up four counties in the northeast of China and the north-central part of the Korean Peninsula, namely Lelang County (Korea) and Xuantu County (Koguryo, Wozhou and Fuyu).

Fan Zhen County (Fan Zhen County) and Lintun County (Lintun County) take Koguryo as the county, which shows that Koguryo was established before the four counties in the Han Dynasty, and denies the legend of Koguryo's founding of the country in the National History Book of the Korean Peninsula.

In 107 BC, wexler and Korea perished. Xuantu County is located in 107 BC, and the other three counties are located in 108 BC. In 82 BC, the eastern part of Fan Zhen County, Lintao County and Xuantu County merged into Lelang County, which was the eastern and southern governors respectively. Xuantu County moved to Koguryo County in the west, and then moved to the northwest of Korea.

In the Han Dynasty, Korea belonged to Le Lang County, and there were sacrifices every year. During the Jian 'an period (196 ~ 220), Gongsun Kang, a separatist regime in Liaodong, divided the wasteland in the south of the county into belt counties, and sent Gong Sunmo and others to collect refugees all over the country and set out to crusade against Koryo and filth. The original residents left only a little, and later Japan and South Korea belonged to Daijun.

Extended data

Korean descent

The name of Korea comes from the tribal alliance "Three Koreas" (Chen Han, Mahan and Han Ge) in the southern part of the ancient Korean Peninsula. During the Eastern Han and Three Kingdoms periods in China, the regime of the Three Koreas was called "Koryo" by the Central Plains. For example, "The Biography of the Three Kingdoms, 50,000 Xianbei Dongyi" records: "At the end of the spirit, the Han State was strong, and the counties could not control it. This is the earliest record that the Korean Peninsula regime is called "Korea". Since then, many regimes on the Korean peninsula have adopted "North Korea" or "Three Koreas" as their nicknames, although they did not take "North Korea" as their country name.

From 1897 to 10, Emperor Gaozong of Korea established the Korean Empire, which made "Korea" enter the historical stage as the official name of the countries on the Korean Peninsula. 19 19 the provisional government of the Republic of Korea was established in Shanghai, China. Although it changed the regime, it still adopted the name of "Korea". From August 1948 to August 15, the country name of the southern part of the Korean peninsula was designated as "Republic of Korea", which was called Korea for short.