Ergun and Argun (Mongolian: , Эргүнэ мөрөн, Ergun Moroni; Manchu: Ergun Bira, Chinese: 额尔古纳河; Аргунь Russian) is the river that forms part of the border with Russia, China . Its headwaters are known as the Hailar River (海拉尔 河, Haila'er He) in China. Its length is 1007 kilometers (1,620 kilometers). The Ergun marks the border between Russia and China for about 944 km until it meets the Amur River, since it was created by the Treaty of Nerchinsk in 1689.The river flows west side of the chain in the Greater Khingan Inner Mongolia. And 'the confluence of the river to Ust-Amur River Strelka Shilka forms.
Kherlen-Ergun-Amur
In years of heavy rainfall, the lake Hulun usually without hope can shed its north shore and the water will meet after the Ergun about 30 km. The system Kherlen-Ergun-Amour has a total length of 5052 km.
Ergun The Secret History of Mongols
In The Secret History of the Mongols, the legend speaks of Ergun-When the Mongolian ancestry. Here, the Mongols and other tribes was carried out in the slaughterhouse in their midst, who continues to live up to the two men and two women. These two families in the fear of the enemy fled to inaccessible terrain, whose conditions were only the mountains and forests, and instead was on the road. Among the mountains the grass was abundant and healthy climate steppe. Then the legend that Ergun-When multiplied by the Mongols and become masters of the smelting of iron, and Blacksmithing. According to legend, is the art of the molten iron has helped them to escape from the gorges of the current scope of the Mongolian steppes to the river and the river Kherlen Ono.