[...] Located at the confluence of the Amur and Ussuri rivers, this island of around 300 square kilometers has long been a subject of dispute between the two countries. In 1929, Russia occupied the island and prohibited China from navigating that part of the Amur River, which Beijing has always contested. In 2004, however, the two countries reached a compromise: The western part of the island went to China, which could also navigate on the Amur River, but in return, Beijing accepted that the eastern part would go to Russia.