China-Russia border
The Chinese–Russian border or the Sino–Russian border is the international border between China and Russia. After the final demarcation carried out in the early 2000s, it measures 4,209.3 km, and is the world's sixth-longest international border.
The China–Russian border consists of two non-contiguous sections: the long eastern section and the much shorter western section.
The eastern border section is over 4000 kilometres in length. According to a joint estimate published in 1999, it measured at 4,195 kilometres (2,607 mi). It starts at the eastern China–Mongolia–Russia tripoint (49°50′42.3″N 116°42′46.8″E / 49.845083°N 116.713000°E), marked by the border monument called Tarbagan-Dakh (Ta'erbagan Dahu, Tarvagan Dakh). From the tripoint, the border line runs north-east, until it reaches the Argun River. The border follows the Argun and Amur river to the confluence of the latter with the Ussuri River. It divides the Bolshoy Ussuriysky Island at the confluence of the two rivers, and then runs south along the Ussuri. The border crosses Lake Khanka, and finally runs to the south-west. The China–Russia border ends when it reaches the Tumen River, which is the northern border of North Korea. The end point of the China–Russia border, and the China-Russia-North Korea tripoint, at (42°25′N 130°36′E / 42.417°N 130.600°E), is located only a few kilometers before the river flows into the Pacific Ocean, the other end of the North Korea–Russia border.
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