Treaty of Aigun
The Treaty of Aigun (Russian: Айгунский договор; ) was an 1858 treaty between the Russian Empire and Qing dynasty of China that established much of the modern border between the Russian Far East and Manchuria (the ancestral homeland of the Manchu people), which is now known as Northeast China. It reversed the Treaty of Nerchinsk (1689) by transferring the land between the Stanovoy Range and the Amur River from Qing China to the Russian Empire. Russia received over from Manchuria.