Originated from Azagongla Glacier (south of Ranwu Lake), its source is 4900 meters above sea level, and it flows into Angongcuo from the source to the north, then turns to the northwest via Ranwucuo (Ranwu Lake), showing a southeast-northwest trend. It flows into the Yarlung Zangbo River near Tongmai Town, turns south and flows into Jiaodong (Pailong Township, Juemu District, Linzhi City), with a drainage area of 2. 8600.000000805 Palong Zangbo is rich in hydraulic resources, ranking first among the five tributaries of the Yarlung Zangbo River. With superior natural conditions, warm and humid climate, abundant precipitation and developed agriculture, the basin is the richest forest resource in Tibet.
Palong Zangbo Grand Canyon is the third deepest canyon in the world, with an average depth of 3,555 meters, which is equivalent to 1.67 times of the Colorado Grand Canyon (depth of 2 133 meters), second only to Culligan Dege Grand Canyon in Nepalese kingdom (depth of 4,403 meters), ranking first in the world, surpassing Colca Grand Canyon in Peru (depth of 3,200 meters).
As the largest canyon in the world is also the largest water vapor channel on the Qinghai-Tibet Plateau, southeastern Tibet has become the "highest oasis in the world" and has the scenery of "southern Tibet". It is foggy and full of weather. There are high snow-capped mountains and glaciers, and lush virgin forests are everywhere. Glaciers often extend into subtropical evergreen broad-leaved forests, and the foothills are farmland, villages and temples. Peach blossoms are hundreds of miles in spring, golden rape flowers are patched up, maple leaves are as red as fire in autumn, and azaleas of various colors are everywhere in summer, competing for each other; The valley in front of the mountain, the clear stream and the rippling lake are really "like Jiangnan, not Jiangnan, but also better than Jiangnan", "the cauliflower is golden and reflects the snow-capped mountains, and the lush forest dances with silver snakes".