![Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)](http://www.ecns.cn/hd/2019/04/22/83e142f1dd4e45b480f9d8c62941861e.jpg)
Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)
![Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)](http://www.ecns.cn/hd/2019/04/22/10c6913e18d549d8963b69c98a8262a2.jpg)
Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)
![Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)](http://www.ecns.cn/hd/2019/04/22/59693904bf1949f685db51e4a3635ca0.jpg)
Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)
![Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)](http://www.ecns.cn/hd/2019/04/22/ed7139b3f434470bbc12110e15483129.jpg)
Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)
![Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)](http://www.ecns.cn/hd/2019/04/22/919b6c8266b54664990091eb5bb8102b.jpg)
Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)
![Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)](http://www.ecns.cn/hd/2019/04/22/97e54f4b14354ac6991ab10a80d92a59.jpg)
Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)
![Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)](http://www.ecns.cn/hd/2019/04/22/e648cccba1e54194962aa0334e6b1994.jpg)
Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)
![Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)](http://www.ecns.cn/hd/2019/04/22/8fc2405d618048518d3d4863b25fa296.jpg)
Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)
![Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)](http://www.ecns.cn/hd/2019/04/22/27d80093687b4c26bc84e8a3720b8a5b.jpg)
Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)
![Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)](http://www.ecns.cn/hd/2019/04/22/e637ed0ed2884bc1966b3a71a2d426b6.jpg)
Aerial photo taken on April 21, 2019 shows the snow scenery of Qilian Mountains in northwest China. (Xinhua/Fan Peishen)