Media preview of 2017 Christmas holiday decorations held at White House

Ornaments on the exterior of the White House are seen in Washington D.C., the United States, on Nov. 27, 2017. Some 150 volunteers from 29 states spent more than 1,600 hours to finish the decorations including 53 Christmas trees and more than 12,000 ornaments. An estimate of 25,000 visitors are expected to tour the White House for the Christmas holiday. (Xinhua/Yin Bogu)