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A child is seen at Puerta del Sol square in Madrid, capital of Spain, Dec. 21, 2018. Christmas lights illuminate the main streets of Madrid, heralding the start of Christmas and New Year celebrations. (Xinhua/Guo Qiuda)
A child is seen at Puerta del Sol square in Madrid, capital of Spain, Dec. 21, 2018. Christmas lights illuminate the main streets of Madrid, heralding the start of Christmas and New Year celebrations. (Xinhua/Guo Qiuda)