Artists and workers prepare ice and snow sculptures for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 16, 2016. (Photo by Aly Song/Reuters)





Artists and workers prepare an ice sculpture for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 16, 2016. (Photo by Aly Song/Reuters)





Artists and workers prepare ice and snow sculptures for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 16, 2016. (Photo by Aly Song/Reuters)





A snow sculpture is seen for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 17, 2016. (Photo by Aly Song/Reuters)





Artists and workers prepare a snow sculpture for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 17, 2016. (Photo by Aly Song/Reuters)





Artists and workers prepare a snow sculpture for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 15, 2016. (Photo by Aly Song/Reuters)





Artists and workers prepare a snow sculpture for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 15, 2016. (Photo by Aly Song/Reuters)





Workers pull a giant ice cube out of the frozen Songhua River as they extract ice to make sculptures for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 17, 2016. (Photo by Aly Song/Reuters)





Workers transport heads of models as they prepare to sell hats at the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 17, 2016. (Photo by Aly Song/Reuters)





Artists prepare a snow sculpture for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 17, 2016. (Photo by Aly Song/Reuters)





A snow sculpture is seen for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 17, 2016. (Photo by Aly Song/Reuters)





A worker poses in his frozen clothes for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 19, 2016. (Photo by Aly Song/Reuters)





An artist polishes an ice sculpture for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 19, 2016. (Photo by Aly Song/Reuters)





A worker prepares an ice sculpture for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 17, 2016. (Photo by Aly Song/Reuters)





Artists and workers prepare ice and snow sculptures for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 16, 2016. (Photo by Aly Song/Reuters)





Workers smile under an ice sculpture for the upcoming Harbin International Ice and Snow Sculpture Festival, in Harbin, Heilongjiang province, China, December 19, 2016. (Photo by Aly Song/Reuters)





An aerial view shows people touring between the large-scale ice sculptures at the 18th Harbin Ice and Snow World during its trial run opening to public in Harbin city, Heilongjiang province, China, 21 December 2016. Some 180,000 cubic meters of ice and 150,000 cubic meters of snow were used to build the 800,000-square-meter ice wonderland. The 33rd Harbin International Ice and Snow Festival will kick off on 05 January 2017 that will last about three months. (Photo by Tian Weitao/EPA)