Disputes
Outer Manchuria is regarded by some Manchu, and for that matter Han Chinese, as territory that was unfairly taken away. However, outstanding boundary issues between China and Russia have been officially settled and relations are cordial. Article 6 of the 2001 Sino-Russian Treaty of Friendship provides that the contracting parties, the People's Republic of China and the Russian Federation, have no territorial claims.
As the Republic of China now based in Taiwan has never recognized the People's Republic of China or its border treaties with other countries, some Chinese maps published in Taiwan still consider the entire Heixiazi Island and the Sixty-Four Villages East of the Heilongjiang River to be Chinese territories, although these maps do show Outer Manchuria, sometimes called "lost territories in the Northeast (China)" (東北失地), to be Russian territory.
Read more about this topic: Outer Manchuria