This river is a major river of Central and South Asia. Along its course, the river passes through the Tibet Autonomous Region of China, the Indian states of Arunachal Pradesh and Assam, and Bangladesh. Throughout its upper course, the river is generally known as the 'Tsangpo' or 'Purifier' It is also known by its Chinese name 'Yarlung Zangbo' and by other local Tibetan names. In its lower course, the river is both a creator and a destroyer, depositing huge quantities of fertile alluvial soil but also causing disastrous and frequent floods. Which river are we talking about?