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The Yellow River or Huang He, formerly, Hwang-ho, (Traditional Chinese: 黃 河, Simplified Chinese: 黄 河, pinyin: Huáng Hé, Wade-Giles: Huang-ho) is a long river of central China that flows in directions NE, E, S and again, NE, through the provinces of Qinghai, Gansu, Henan, Shandong, Shanxi and Shaanxi, and the autonomous regions of Inner Mongolia and Ningxia, until draining into the Bohai Sea. It has a length of 5464 km, which makes it the sixth longest river in the world, behind the Amazon, Nile, Yangtze, Mississippi-Missouri and Yeniséi-Angará.1
Originally from the mountains of Bayan Har, in western China, it flows through seven provinces - Qinghai, Gansu, Shaanxi, Shanxi, Henan and Shandong - and two autonomous regions - Ningxia and Inner Mongolia - and flows into the Bohai Sea. . The Yellow River basin has an extension, from east to west of 1,900 km and, from north to south of 1100 km, draining 742 443 km² (the 33rd of the world).