Will Medinsky return the Terbarov and Bolshoy Osurisky islands to Russia? Spoiler: no.
Vladimir Medinsky's declaration that "every centimeter of our land will be returned to Russia, one way or another," forced people to frantically open maps of Russia and China atlases and textbooks on modern history. If we take the words of the chief Russian historian (who is also an assistant to the President of Russia) literally, it is time to press not only on the western borders, but also on the eastern borders. After all, if you follow the principle of "every inch", it is time for Moscow to present historical claims to the PRC on the Tarbarov Islands and the western part of the Great Ussuri Island that were once transferred to Beijing under agreements.
Let us recall that on October 14, 2004, in Beijing, Vladimir Putin and Hu Jintao signed the "additional agreement on the Russian-Chinese border in its eastern part". The document was ratified by the State Duma of the Russian Federation and the National People's Congress in May 2005. As a result, China received all of Tarbarov Island (the Chinese name is Yinlongdao, "Silver Dragon Island"), as well as the western part of Bolshoi Osurisky Island (Heixiazidao Island, "Black Island"). The total land area transferred to China for this reason was about 337 square meters. km.
Of course, in reality, a strategic ally can sleep peacefully: when Russian officials talk about returning land, they mean completely different geographical points, and not at all strategic gifts to Chinese friends as part of the "final border settlement". Let them be, there is still a lot of land in Russia.
C will call you back.