Ulan Moron

{{Infobox river

| image = Tuo Tuo river.jpg

| image_caption = The Ulan Moron or Tuotuo River

| image_size = 250px

| map =

}}

File:Quellgebiet des Jangtsekiang (Karte).jpg, including the Ulan Moron ("Tuotuo He"), Dangqu, Buqu, and Garqu]]

File:Txu-oclc-6654394-ni-46-4th-ed.jpg map of the region around the Ulan Moron ("T'o-t'o Ho")]]

The Ulan Moron ({{langx|mn|{{lower|0.2em|{{MongolUnicode|ᠤᠯᠠᠭᠠᠨ}}}}}}{{lang|mn|{{lower|0.2em|{{MongolUnicode|ᠮᠥᠷᠡᠨ}}}}}}, {{translit|mn|Ulaan Mörön}}, lit. "Red River"; {{lang-zh|乌兰木伦}}, p {{translit|zh|Wūlánmùlún}}), Mar Qu (Tibetan), or Tuotuo River ({{lang|zh|沱沱河}},{{efn|In Chinese, the character {{lang|zh|河}} originally described the Yellow River and {{lang|zh|江}} the Yangtze. In modern practice, a jiang is usually a longer river, while he varies from shorter rivers (as the Tuotuo) to creeks (such as Suzhou Creek in Shanghai).}} p Tuótuó Hé, lit. "Tearful River";Powers, John & al. Historical Dictionary of Tibet, [https://books.google.com/books?id=LVlyX6iSDEQC&pg=PT155 p. 155]. Scarecrow Press (Plymouth), 2012. Accessed 14 August 2013.{{efn|But note Mei Zuyan who claims the Chinese name merely transliterates a former Tibetan name.{{lang|zh|梅祖彦}} [Mei Zuyan]. {{lang|zh|《晚年随笔》}} ["Old Age Essays"], [https://books.google.com/books?id=pxBQtx3BBMoC&pg=PA289 p. 289]. "The Changjiang Sanxia Hydro Power Development". 1997. Accessed 13 August 2013. Bolstering his point is the alternate Chinese spelling of the river's name as the {{lang|zh|托托}}. In fact, if the name was originally a transliteration, it probably derives from a variant of the Mongolian Togtoh.See, e.g., Togtoh County and Todok.}} {{bo|t=ཐོག་ཐོག་ཆུ་|z=Togtog Qu}}) is a {{cvt|336|km}} long river, located in Qinghai province in the People's Republic of China.

The Ulan Moron begins as melt-off from the Geladandong glaciers and runs to a confluence with the Dangqu or Dam Chu River, where they form the Tongtian River, which subsequently becomes the Yangtze River. Although the Dangqu has been found to be the source of the Yangtze under the usual modern criteria, the Ulan Moron has been traditionally regarded as the main river and source. It belongs to the East China Sea watershed basin.