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China's Zhang Mengyu (R) competes against Azerbaijan's Farida Azizova during the women's -67kg semifinal at the World Taekwondo Championships 2019 in Manchester, Britain on May 18, 2019. (Xinhua/Jon Super)

China's Zhang Mengyu (R) competes against Azerbaijan's Farida Azizova during the women's -67kg semifinal at the World Taekwondo Championships 2019 in Manchester, Britain on May 18, 2019. (Xinhua/Jon Super)