The Togtogquwo railway station (Tibetan: ཐོག་ཐོག་ཆུ་བོའི་འབབ་ཚུགས་, ZYPY: Togtogquwoi Babcug) or the Tuotuohe railway station (Chinese: 沱沱河站; pinyin: Tuótuóhé Zhàn) is a station on the Chinese Qinghai–Tibet Railway. It is located at 34°13′59.26″N 92°26′44.80″E / 34.2331278°N 92.4457778°E near the railway bridge over the Tuotuo River (沱沱河, Tuótuóhé), which is considered the headwaters of China's great Yangtze River. (Further downstream, it is known in China as the Tongtian River, Jinsha River, and finally the Changjiang).