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![(SP)ARGENTINA-BUENOS AIRES-SUMMER YOUTH OLYMPIC GAMES-SWIMMING-MIXED 4X100](137518490_15389947453331n.jpg)
Shen Jiahao of China competes during the Mixed 4X100 Freestyle Relay Final at the 2018 Summer Youth Olympic Games in Buenos Aires, capital of Argentina, Oct. 7, 2018. (Xinhua/Zhu Zheng)
Shen Jiahao of China competes during the Mixed 4X100 Freestyle Relay Final at the 2018 Summer Youth Olympic Games in Buenos Aires, capital of Argentina, Oct. 7, 2018. (Xinhua/Zhu Zheng)