Visitors take photos of Christmas trees decorated with lights in Berlin, Germany, on Dec, 23, 2014. (Xinhua/Zhang Fan)
A man rides an elevator inside a building as Christmas light decorations are reflected on the glass in Berlin, Germany, on Dec, 23, 2014. (Xinhua/Zhang Fan)
A man makes a phone call beside a Christmas tree inside a building in Berlin, Germany, on Dec, 23, 2014. (Xinhua/Zhang Fan)
A man walks on a street with trees decorated with lights in Berlin, Germany, on Dec, 23, 2014. (Xinhua/Zhang Fan)
Photo taken on Dec, 23, 2014 shows a Christmas tree decorated with lights in front of the Brandenburger Gate in Berlin, Germany. (Xinhua/Zhang Fan)