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Ilia Burov of Russia competes during the mixed team final at the Freestyle Skiing Aerials World Cup in Zhangjiakou, north China's Hebei Province, Dec. 17, 2017. (Xinhua/Fei Maohua)

Ilia Burov of Russia competes during the mixed team final at the Freestyle Skiing Aerials World Cup in Zhangjiakou, north China's Hebei Province, Dec. 17, 2017. (Xinhua/Fei Maohua)