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Nicola Stoll (C) of Switzerland competes during the men's match between Russia and Switzerland at the International Curling Elite 2019 in Xining, capital of northwest China's Qinghai Province, Dec. 7, 2019. (Xinhua/Zhang Long)

Nicola Stoll (C) of Switzerland competes during the men's match between Russia and Switzerland at the International Curling Elite 2019 in Xining, capital of northwest China's Qinghai Province, Dec. 7, 2019. (Xinhua/Zhang Long)