"Yan'er", the mascot of the 15th IAAF World Athletics Championships is seen during the opening ceremony for the 15th IAAF World Athletics Championships in Beijing, capital of China, on Aug. 22, 2015. (Xinhua/Wang Lili)
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"Yan'er", the mascot of the 15th IAAF World Athletics Championships is seen during the opening ceremony for the 15th IAAF World Athletics Championships in Beijing, capital of China, on Aug. 22, 2015. (Xinhua/Wang Lili)