Tourists visit a scenic spot in Yuli County, northwest China's Xinjiang Uygur Autonomous Region, Nov.It is the best viewing period of the year for the desert poplar (populus euphratica) forest in the Tarim River Basin of Xinjiang. Approximately 15 million mu (1 million hectares) of desert poplar forest are distributed here, making it the largest desert poplar forest in the world. (Xinhua/Wang Fei)