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China's Zheng Si Wei, right, and Huang Ya Qiong, left, cheer during their mixed doubles final match against Thailand's Dechapol Puavaranukroh and Sapsiree Taerattanachai at the BWF Badminton World Championships in the St. Jakobshalle in Basel, Switzerland, on Sunday, August 25, 2019. (KEYSTONE/Georgios Kefalas)