evidence: Noktundo [edit]Noktundo, a former island (now effectively a peninsula) at the mouth of the Tumen, has been a boundary contention between Russia and North Korea.[8] The Qing Dynasty ceded the island to Russia as part of the Primorsky Maritimes (East Tartary) in the 1860 Treaty of Peking.[8] In 1990, the former Soviet Union and North Korea signed a border treaty which made the border run through the center of the river, leaving territory of the former island on Russian side. South Korea refuses to acknowledge the treaty and demanded that Russia return the territory to Korea.[9] [...] - ^ "The problem of the Noktundo island in the media in South Korea (Проблема острова Ноктундо в средствах массовой информации Южной Кореи)" (in Russian). ru.apircenter.org. Archived from the original on 10 September 2013. Retrieved 30 June 2015.