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Jang Woojin (R) of South Korea and Cha Hyo Sim (C) of the Democratic People's Republic of Korea (DPRK) compete during the mix doubles final match against Wang Chuqin/Sun Yingsha of China at 2018 ITTF World Tour Korea Open in Daejeon, South Korea, July 21, 2018. Jang Woojin/Cha Hyo Sim won 3-1 and claimed the title. (Xinhua/Wang Jingqiang)