Where does the Yangtze River rise near the Qinghai-Tibet boundary?

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The Yangtze River rises in southern Qinghai province on the border with the Tibet Autonomous Region. Specifically, its source is the Ulan Moron (Wulanmulun) River, which originates from glacial meltwaters located on the slopes of the Tanggula Mountains.123

The Tanggula Mountains serve as a critical geographical feature in this region, as the boundary between Qinghai and Tibet parallels the range. The northern flank of these mountains is drained by various headwaters that contribute to the Yangtze River.24