Nanjing Yangtze River Bridge engulfed by thick fog

The aerial view shows Nanjing Yangtze River Bridge shrouded by a thick blanket of fog on March 4, 2019. Built in 1968, the Nanjing Yangtze River Bridge has a double layer structure. The upper layer is used for highway traffic while the lower layer is used for trains. It is a key landmark for the provincial capital of Nanjing. [Photo: IC]