Yarlung Tsangpo

The Yarlung Tsangpo, also called Yarlung Zangbo (Tibetan: ཡར་ཀླུངས་གཙང་པོ་, Wylie: yar kLungs gTsang po, ZWPY: Yarlung Zangbo) and Yalu Zangbu River (Chinese: 雅鲁藏布江; pinyin: Yǎlǔzàngbù Jiāng), is the upper course of Brahmaputra River. It flows through the Tibet Autonomous Region of China and Arunachal Pradesh state of India. It is the longest river of Tibet and the fifth longest in China. The upper section is also called Dangque Zangbu meaning "Horse River".

Originating from the Angsi Glacier in western Tibet, southeast of Mount Kailash and Lake Manasarovar, it later forms the South Tibet Valley. When leaving the Tibetan Plateau, the river forms the world's largest and deepest canyon, Yarlung Tsangpo Grand Canyon. before passing into Arunachal Pradesh where it gets far wider and is called the Siang. After reaching Assam, the river becomes known as the Brahmaputra.