A flock of bar-headed geese fly over a wetland area of Kazak Autonomous County of Aksay, northwest China's Gansu Province, Aug. 22, 2019. Kazak Autonomous County of Aksay is located in the west of Qilian Mountain, with over ten species of wild animals inhabiting here. During the past years, a series of measures have been taken to improve the ecological environment and protect natural reserves including establishing first-aid stations for injured wild animals, imposing prairie grazing restriction and punishing unapproved hunting. (Xinhua/Ma Ning)