Detailed Instructions: Given a text passage, come up with an appropriate title for it. The title should accurately represent what the main focus of the passage is. The title of a passage may be present in the first few sentences of the passage and/or be referred to multiple times in the passage. The title should be 1-5 words long.
Q: The Tuotuo River ( , p Tuotuo He , lit . '' Tearful River '' is the official headstream of the Yangtze , and flows 358 km ( 222 mi ) from the glaciers of the Gelaindong Massif in the Tanggula Mountains of southwestern Qinghai to the confluence with the Dangqu River to form the Tongtian River . ) In Mongolian , this section of the river known as the Ulaan Moron or the '' Red River '' .
A:
Yangtze