Abagaitu Islet
49°33′31″N 117°53′54″E / 49.55857°N 117.898364°E
Abagaitu Islet (simplified Chinese: 阿巴该图洲渚; traditional Chinese: 阿巴該圖洲渚; pinyin: Ābāgāitú Zhōuzhǔ; Template:Lang-ru, Bolshoy Ostrov) is an islet in the Argun River forming the border between the People's Republic of China (Inner Mongolia Autonomous Region) and Russia (Chita Oblast).
The island was occupied by the Soviet Union in 1929, a move not accepted by China, resulting in a border dispute that lasted more than seventy years.
On October 14, 2004, the Complementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the China-Russia Boundary was signed, in which Russia agreed to relinquish control over Abagaitu Islet. In 2005, the Russian Duma and the Chinese National People's Congress approved the agreement.
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