Pinghu Autumn Colors Introduction: Weushui River and Juyan Seaside are the hometowns of Populus euphratica. The 390,000 acres of Populus euphratica forest here is one of the only three remaining natural river Populus euphratica forests in the world. It prevents the Badain Jaran Desert from moving northward. It is an important barrier to spread and a natural treasure trove of ecological resources in western China.