Aerial photo taken on April 25, 2019 shows the scenery of advection fog in Danzhai County, southwest China's Guizhou Province. (Xinhua/Yang Wenbin)

Aerial photo taken on April 25, 2019 shows the scenery of advection fog in Danzhai County, southwest China's Guizhou Province. (Xinhua/Yang Wenbin)

Aerial photo taken on April 25, 2019 shows the scenery of advection fog in Danzhai County, southwest China's Guizhou Province. (Xinhua/Yang Wenbin)

Aerial photo taken on April 25, 2019 shows the scenery of advection fog in Danzhai County, southwest China's Guizhou Province. (Xinhua/Yang Wenbin)