Barheaded geese are seen in Subei Mongolian autonomous county, northwest China’s Gansu province, June 7, 2015.[Photo/Xinhua]

Barheaded geese are seen in Subei Mongolian autonomous county, northwest China’s Gansu province, June 7, 2015.[Photo/Xinhua]

Blue sheep run on the meadow in Subei Mongolian autonomous county, northwest China’s Gansu province, June 6, 2015.[Photo/Xinhua]

Blue sheep are seen in Subei Mongolian autonomous county, northwest China’s Gansu province, June 6, 2015.[Photo/Xinhua]

Wild donkeys run on the grassland in Subei Mongolian autonomous county, northwest China’s Gansu province, June 6, 2015. [Photo/Xinhua]