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Ikee Rikako of Japan competes during Women's 50m Butterfly Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. Rikako won the gold medal. (Xinhua/Fei Maohua)

Ikee Rikako of Japan competes during Women's 50m Butterfly Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. Rikako won the gold medal. (Xinhua/Fei Maohua)