China's Zhang Nan (R) and Zhao Yunlei react during a mixed doubles quarterfinal of Badminton against Japan's Kenta Kazuno and Ayane Kurihara at the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, on Aug. 14, 2016. Zhang Nan and Zhao Yunlei won 2-0. (Xinhua/Yin Bogu)