Jisho

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Wikipedia definition
1. UndokUndok is a kun, or county, in North Hamgyong province, North Korea. Formerly known as Kyŏnghŭng County, it was given its current name in 1977. The county borders the People's Republic of China to the northeast. With the exception of the southwest, it is dominated by low hills, with occasional plains. The highest point is Songjinsan (1146 m). The dominant river is the Tumen, which separates the county from China.
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