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 ,Китай (China), at the Rosgranitsa site and is the world's fifth-longest international border. According to the Russian border agency, as of October 1, 2013, there are more than 160 land border crossings between Russia and China, all of which are open 24 hours. There are crossing points established by the treaty including railway crossings, highway crossings, river crossing, and mostly ferry crossings.The 1994 agreement is: Соглашение между Правительством Российской Федерации и Правительством Китайской Народной Республики о пунктах пропуска на российско-китайской государственной границе. Пекин, 27 января 1994 года (The Agreement between the Government of the Russian Federation and the Government of the People's Republic of China on the border crossing points on the Russia–China international border. Beijing, January 27, 1994). The text only lists 21 border crossing points.

Description The eastern border section is over in length. According to a joint estimate published in 1999, it measured at .Sébastien Colin, Le développement des relations frontalières entre la Chine et la Russie, études du CERI n°96, July 2003. (Note: this publication preceded the 2004 final settlement, and thus the estimate may slightly differ from the current number). It starts at the eastern China–Mongolia–Russia tripoint (), marked by the border monument called Tarbagan-Dakh (Ta'erbagan Dahu, Tarvagan Dakh).ПРОТОКОЛ-ОПИСАНИЕ ТОЧКИ ВОСТОЧНОГО СТЫКА ГОСУДАРСТВЕННЫХ ГРАНИЦ ТРЕХ ГОСУДАРСТВ МЕЖДУ ПРАВИТЕЛЬСТВОМ Российской Федерации, ПРАВИТЕЛЬСТВОМ МОНГОЛИИ и ПРАВИТЕЛЬСТВОМ КИТАЙСКОЙ НАРОДНОЙ РЕСПУБЛИКИ (Protocol between the Government of the Russian Federation, the Government of Mongolia, and the Government of the People's Republic of China, describing the eastern junction point of the borders of the trees states) Соглашением между Правительством Российской Федерации, Правительством Китайской Народной Республики и Правительством Монголии об определении точек стыков государственных границ трех государств (Заключено в г. Улан-Баторе 27 января 1994 года) (The Agreement between the Government of the Russian Federation, the Government of the People's Republic of China, and the Government of Mongolia on the determination of the points of junction of the national borders of the three states) From the tripoint, the border line runs north-east, until it reaches the Argun River. The border follows that river to the Amur River, and 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–North Korea–Russia tripoint, at (), is located only a few kilometers before the river flows into the Pacific Ocean, the other end of the North Korea–Russia border.

The much shorter (about ) western border section is between Russia's Altai Republic and China's Xinjiang. It runs in the mostly snow-covered high elevation area of the Altai Mountains. Its western end point is the China–Kazakhstan–Russia tripoint, whose location is defined by the trilateral agreement as , elevation, 3327 m.Соглашение между Российской Федерацией, Республикой Казахстан и Китайской Народной Республикой об определении точки стыка государственных границ трех государств, от 5 мая 1999 года (The agreement between the Russian Federation, Republic of Kazakhstan, and the People's Republic of China on determining the junction point of the international borders of the three states. May 5, 1999) Its eastern end is the western China–Mongolia–Russia tripoint, at the top of the peak Tavan Bogd Uul (Mt Kuitun),中华人民共和国和俄罗斯联邦关于中俄国界西段的协定 (Agreement between the PRC and RF in regard to the western section of the China-Russia border), 1994-09-03 ПРОТОКОЛ-ОПИСАНИЕ ТОЧКИ ЗАПАДНОГО СТЫКА ГОСУДАРСТВЕННЫХ ГРАНИЦ ТРЕХ ГОСУДАРСТВ МЕЖДУ ПРАВИТЕЛЬСТВОМ Российской Федерации, ПРАВИТЕЛЬСТВОМ МОНГОЛИИ и ПРАВИТЕЛЬСТВОМ КИТАЙСКОЙ НАРОДНОЙ РЕСПУБЛИКИ (ПОДПИСАН в г. ПЕКИНЕ 24.06.1996) (Protocol between the Government of the Russian Federation, the Government of Mongolia, and the Government of the People's Republic of China, describing the western junction point of the borders of the three states. Signed in Beijing, June 24, 1996) at the coordinates ,Soviet Topo map M45-104, scale 1:100,000, elevation 4374 m.

History Tsarist era (pre-1917)

Today's Sino-Russian border line is mostly inherited by Russia (with minor adjustments) from the Soviet Union, while the Sino-Soviet border line was essentially the same as the border between the Russian and Qing Empires, settled by a number of treaties from the 17th through to the 19th centuries. Border issues first became an issue following Russia's rapid expansion into Siberia in the 17th century, with intermittent skirmishes occurring between them and Qing China. Below is a list of important border treaties, along with the indication as to which section of today's Sino-Russian border were largely set by them: Treaty of Nerchinsk (1689) - this covered the far eastern section of the border, creating a line along the Argun River and Shilka River, then proceeding overland via the Stanovoy Mountains, and then along the Uda river, terminating at the Tugur peninsula by the Sea of Okhotsk. Treaty of Kyakhta (1727), plus supplementary protocols of the same year - these were concerned mostly with the border line that is currently the Mongolia–Russia border (Mongolia then being part of China), this fixing a line from the river Irtysh in the west to the Argun in the east. Treaty of Aigun (1858) - this shifted the eastern border to run along the Amur River out to the Okhotsk. Convention of Peking (1860) - this finalised the eastern stretch of the border, with China ceding to Russia the territory of modern Primorsky Krai and southern Khabarovsk Krai, created the short border between Russia and the Korean Peninsula, leaving Noktundo at the Russian side and blocking China's access to the Sea of Japan. Treaty of Tarbagatai (1864) - this created the western section of the border in Central Asia, with the bulk of this border now forming China's borders with Kazakhstan, Kyrgyzstan and Tajikistan (with modifications). The border was modified via later treaties such as the Treaty of Saint Petersburg (1881), though the modern Russian section remained at the same place. Qiqihar Agreement (1911) - modified the eastern border along the Argun slightly, however China later repudiated the treaty.

Sino-Soviet border (1917–1991)

Following the Russian Revolution in 1917 and the later formation of the Soviet Union, there have been a number of issues along the border: In 1911 Outer Mongolia declared independence from China; the USSR recognised the country in 1921, thus removing a large part of the China-USSR border and splitting it into two sections. China later recognised Mongolian independence in 1946. Sino-Soviet conflict (1929) - a conflict largely centred on the Chinese Eastern Railway. Sino-Soviet border conflict (1969) - this was a serious seven-month undeclared military conflict between the Soviet Union and China at the height of the Sino-Soviet split in 1969 (China having been taken over by Communists in 1949). Although military clashes ceased that year, the underlying issues were not resolved until the 1991 Sino-Soviet Border Agreement. The most serious of these border clashes, which brought the two countries to the brink of all-out war, occurred in March 1969 in the vicinity of Zhenbao (Damansky) Island on the Ussuri (Wusuli) River; as such, Chinese historians most commonly refer to the conflict as the Zhenbao Island Incident.People.com.cn. "People.com.cn ." 1969年珍宝岛自卫反击战. Retrieved on 5 November 2009. Heavily militarised following the war, the border slowly opened after 1982, allowing the first exchange of goods between the two countries, though the territorial disputes remained unresolved. Between 1988 and 1992 the cross-border commerce between Russia and Heilongjiang province increased threefold, with the number of legal Chinese workers in Russia increasing from 1,286 to 18,905.

Three countries bordered both China and the Soviet Union: Afghanistan, Mongolia and North Korea. Both the Democratic Republic of Afghanistan and Mongolian People's Republic were pro-Soviet satellite states during the Cold War, while the Democratic People's Republic of Korea was neutral.

Post-1991 The waning years of the Soviet Union saw a reduction of the tensions on the then heavily fortified Sino-Soviet border. In 1990–91, the two countries agreed to significantly reduce their military forces stationed along the border. To this day one can find numerous abandoned military facilities in Russia's border districts.Numerous photo reports from such sites exist on the internet. See e.g. Заброшенный укрепрайон на Большом Уссурийском острове (Abandoned fortified area in Bolshoy Ussuriysky Island)

Even though the Sino-Soviet border trade resumed as early as 1983–85, it accelerated in 1990–91; the rate of cross-border trade continued to increase as the USSR's former republics became separate states. To accommodate increasing volume of travel and private trade, a number of border crossings were re-opened. In early 1992, China announced border trade incentives and the creation of special economic zones (SEZs) along the Sino-Russian border, the largest of these being in Hunchun, Jilin.

In 1991, China and USSR signed the 1991 Sino-Soviet Border Agreement, which was intended to start the process of resolving the border disputes held in abeyance since the 1960s. The border agreement was witnessed by General Secretary of the Chinese Communist Party Jiang Zemin and General Secretary of the Communist Party of the Soviet Union Mikhail Gorbachev during Jiang's official visit to the Soviet Union on May 16, 1991. However, just a few months later the USSR was dissolved, and four former Soviet republics — Russia, Kazakhstan, Kyrgyzstan, and Tajikistan — inherited various sections of the former Sino–Soviet border.

It took more than a decade for Russia and China to fully resolve the border issues and to demarcate the border. On May 29, 1994, during Russian prime minister Viktor Chernomyrdin's visit to Beijing, an "Agreement on the Sino-Russian Border Management System intended to facilitate border trade and hinder criminal activity" was signed. On September 3, a demarcation agreement was signed for the short () western section of the binational border; the demarcation of this section was completed in 1998.

In November 1997, at a meeting in Beijing, Russian President Boris Yeltsin and Chinese leader, CCP General Secretary Jiang Zemin signed an agreement for the demarcation of the much longer (over ) eastern section of the border, in accordance with the provisions of the 1991 Sino-Soviet agreement.

The last unresolved territorial issue between the two countries was settled by the 2004 Complementary Agreement between China and Russia on the Eastern Section of the China–Russia Boundary.. October 14, 2004 Pursuant to that agreement, Russia transferred to China a part of Abagaitu Islet, the entire Yinlong (Tarabarov) Island, about half of Bolshoy Ussuriysky Island, and some adjacent river islets. The transfer was ratified by both the Chinese National People's Congress and the Russian State Duma in 2005, thus ending the decades-long border dispute. The official transfer ceremony was held on-site on October 14, 2008.

Border management