Treasure Island is located on the Chinese side of the main channel of Wusuli River, a tributary of Heilongjiang, and belongs to Hulin City, Heilongjiang Province, China, at the southern end of Raohe County. 1929 After the Zhongdong Road incident, the former Soviet Union occupied Heixiazi Island. After the August storm at the end of World War II, the Soviet Red Army began to patrol Treasure Island from 1947. 1964 during the Sino-Soviet border negotiations, the Soviet side was ready to return the treasure island to the Chinese side, but the negotiations were suspended due to the deterioration of Sino-Soviet relations. From 1967 to 1969, patrol conflicts occurred in several places on the border between the two sides, such as Qiliqin Island and Zhenbao Island on the Wusuli River. In order to defend the territorial sovereignty of the country, the border guards fought bravely under the unfavorable situation of poor equipment and repelled many local attacks, and in September 165438+. After that, the situation eased. After the war, China took control of the whole island.
199 1 year, Russia recognized Treasure Island as belonging to China. In 2004, China and Russia signed the Supplementary Agreement between People's Republic of China (PRC) and the Russian Federation on the State Border of Eastern China and Russia, which was approved by the two governments in March and April 2005. So far, the 4,300-kilometer border between China and Russia, including Treasure Island, has been determined.