Generational Dynamics World View

[SomeGuy]

Manchukuo had roughly the same boundaries as the region in Modern China, I think their border stopped at the river.  The Japanese did cross the river lower down, when they fought the Battle of Lake Khasan with the Soviets, and the Red Army did invade back over the river when they fought the Kwantung Army in 1945.


All in all, it's a point of contention between China and Russia (however defined), and I don't there have been any other claimants in a long time.