Gold medalist Sun Jiajun (C) of China, silver medalist Denis Petrashov (L) of Kyrgyzstan and bronze medalist Taniguchi Taku of Japan pose for photos during the awarding ceremony of the men's 100m breaststroke at the 2018 Summer Youth Olympic Games in Buenos Aires, Argentina on Oct. 8, 2018. (Xinhua/Zhu Zheng)