Photo taken on Oct 5, 2018 shows the fall scenery at Chaihe scenic area in Zalantun, Hulunbuir League, Inner Mongolia autonomous region. Situated in the southern Greater Hinggan Mountains, Hulunbuir Prairie is one of the world’s top 3 grasslands with an elevation between 650 and 700 meters and an area of about 100,000 square meters. [Photo/Xinhua]