160 years ago, on May 28, 1858, the Russian-Chinese Treaty of Aigun was concluded, according to which the Amur Region became part of Russia, and the Ussuri Territory was recognized as joint property. Navigation on the Amur, Sungari and Ussuri was allowed only for Russian and Chinese ships and prohibited for everyone else.
Interestingly, the agreement was drawn up by Rafail Chernosvitov, a Siberian gold miner, a former exile in the Petrashevsky case and a friend of the Governor-General of Eastern Siberia, Count Nikolai Muravyov, who signed the agreement on the Russian side.