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Maddie Mastro of the United States competes during the Women's Snowboard Halfpipe final at FIS Snowboard World Cup 2020 in Chongli, north China's Hebei Province, Dec. 22, 2019. (Xinhua/Wang Xiao)

Maddie Mastro of the United States competes during the Women's Snowboard Halfpipe final at FIS Snowboard World Cup 2020 in Chongli, north China's Hebei Province, Dec. 22, 2019. (Xinhua/Wang Xiao)