 Socially and politically, from about 600 AD, it was the northern fringe of the Chinese-Manchu world.Various Chinese dynasties would claim sovereignty, build forts and collect tribute when they were strong enough.The Ming dynasty Nurgan Regional Military Commission built a fort on the Northern bank of the Amur at Aigun, and established an administrative seat at Telin, modern Tyr, Russia above Nikolaevsk-on-Amur.