Photo taken on July 31, 2010 shows the populus diversifolia in Mori, northwest China's Xinjiang Uygur Autonomous Region. Xinjiang Uygur Autonomous Region, covering 1.6 million square kilometers, has the largest amount of natural populus diversifolia, which is resistant to saline-alkali soil and other hostile conditions in the northwest area, and is utilised to shelter villages and crops in desert or semi-desert areas. [Xinhua/Jiang Wenyao]