Russia – China

The international boundary separating China and Russia is known as the Sino-Russian border. It is the sixth-longest international boundary in the world after the final demarcation, which was completed in the early 2000s, and measures 4,209.3 kilometers (2,615.5 miles). The border between China and Russia is made up of two independent, non-contiguous sections: the lengthy eastern portion between North Korea and Mongolia and the significantly shorter western section between Kazakhstan and Mongolia. The physical methods of administering the China-Russia border are governed by a bilateral treaty, as is the case with many other international borders. The agreement that is still in effect today was reached in Beijing in 2006.

Civil navigation is permitted on the border rivers and lakes as long as the boats from each nation stay on the proper side of the dividing line; fishing is also permitted in these waterways under identical conditions. The authorities of each country shall take all necessary steps to prevent grazing cattle from crossing into the other country and shall make every effort to arrest and return any such livestock that stray beyond the border. Within 1,000 meters (3,300 feet) of the borders, hunting with guns is forbidden. Hunters are also not allowed to cross the border in pursuit of a wounded animal. Within 7 days after their capture, detained border crossers are typically meant to be sent back to their country of origin.

Length: 3,645 kilometers