International Olympic Committee President Thomas Bach(C) watches Wushu performance in Nanjing 2014 Sports Lab at the Nanjing 2014 Youth Olympic Games in Nanjing, capital of east China's Jiangsu Province, on August 21, 2014. Roller Skating along with Wushu, Sport Climbing, and Skateboarding, are selected for showcasing in the Sports Lab. (Xinhua/Song Zhenping)
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