Poplar forests in Shaya County, Aksu Prefecture, Xinjiang Uygur Autonomous Region. Poplar forests are the most important ecological barrier between desert and inhabited oases.
The rare tree in nature can overcome drought, salinity, high temperature, cold and almost all harsh environments to grow into forests. The roots deep underground can tightly "grasp" the sand within a radius of 20 or 30 meters. The poplar forest is large, and at noon they can only feed themselves with dry food.