![](http://www.ecns.cn/hd/2019/10/11/c5380e2e86824daa8d69cac8609b6836.jpg)
A rare weather phenomenon that saw white clouds cut in half an otherwise clear blue sky is seen in Shanghai, Oct. 10, 2019. Weather authorities said the phenomenon was a result of the meeting of dry and wet air masses. (Photo: China News Service/Wang Yadong)
![](http://www.ecns.cn/hd/2019/10/11/cf3baeca5ea44a9db088f52db2635a29.jpg)
A rare weather phenomenon that saw white clouds cut in half an otherwise clear blue sky is seen in Shanghai, Oct. 10, 2019. Weather authorities said the phenomenon was a result of the meeting of dry and wet air masses. (Photo: China News Service/Wang Yadong)
![](http://www.ecns.cn/hd/2019/10/11/82116daa0b104ea9a8d072c9f0b81127.jpg)
A rare weather phenomenon that saw white clouds cut in half an otherwise clear blue sky is seen in Shanghai, Oct. 10, 2019. Weather authorities said the phenomenon was a result of the meeting of dry and wet air masses. (Photo: China News Service/Wang Yadong)