A hiker takes photos of the U-shaped Great Bend of Yarlung Zangbo River Grand Canyon in Nyingchi, southwest China's Tibet Autonomous Region, Jan. 4, 2014. Yarlung Zangbo River Grand Canyon is regarded as the deepest canyon in world, and is slightly longer than the Grand Canyon in the United States, the symbolic scenery of which is the U-shaped Great Bend near Nyingchi County. (Xinhua/Wang Yunjia)
