![Blue alert engaged for dust clogging the air in Beijing(3/11)](http://www.ecns.cn/hd/2018/03/29/dcd76b952f8941b6a38f86732cb19ef8.jpg)
Tourists take photos of the Palace Museum, also known as the Forbidden City, shrouded in dust in Beijing on March 28, 2018. (Photo: Li Hao/GT)
Tourists take photos of the Palace Museum, also known as the Forbidden City, shrouded in dust in Beijing on March 28, 2018. (Photo: Li Hao/GT)