![](http://www.ecns.cn/hd/2020/01/07/6a705fc369bf45b2902a305e75113f06.jpg)
Mammatus clouds are seen over Guiyang, southwest China's Guizhou Province, Jan. 6, 2020. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2020/01/07/0e0089c22ee34d5cb054b1468dea6321.jpg)
Mammatus clouds are seen over Guiyang, southwest China's Guizhou Province, Jan. 6, 2020. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2020/01/07/16e61cbd183748e5b84001bc1e251c9c.jpg)
Mammatus clouds are seen over Guiyang, southwest China's Guizhou Province, Jan. 6, 2020. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2020/01/07/a38af5c76a8943d0ba6608443045cd69.jpg)
Mammatus clouds are seen over Guiyang, southwest China's Guizhou Province, Jan. 6, 2020. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2020/01/07/26c92d754bd0432ba263d47060db4d7c.jpg)
Mammatus clouds are seen over Guiyang, southwest China's Guizhou Province, Jan. 6, 2020. (Xinhua/Liu Xu)