Treaty of Nerchinsk
In 1643, Vassili Poyarkov's boats descended the Amur, returning to Yakutsk by the Sea of Okhotsk and the Aldan River, and in 1649–1650 Yerofey Khabarov occupied the banks of the Amur. The resistance of the Chinese, however, obliged the Cossacks to quit their forts, and by the Treaty of Nerchinsk (1689), Russia abandoned its advance into the basin of the river.