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Winner Jaelin Kauf of the United States celebrates on the podium after winning the ladies' Moguls on the Day 1 of the 2017-2018 Freestyle Skiing World Cup-Moguls & Aerials at the Thaiwoo ski resort in Chongli District of Zhangjiakou City, north China's Hebei Province, Dec.21, 2017. (Xinhua/Meng Jing)