![A sign is shown on the shoes of China's Lin Dan during a training session of badminton at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, Aug. 9, 2016. (AP A sign is shown on the shoes of China's Lin Dan during a training session of badminton at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, Aug. 9, 2016. (AP](https://c8.alamy.com/comp/2MY6MTH/a-sign-is-shown-on-the-shoes-of-chinas-lin-dan-during-a-training-session-of-badminton-at-the-2016-summer-olympics-in-rio-de-janeiro-brazil-tuesday-aug-9-2016-ap-photokin-cheung-2MY6MTH.jpg)
A sign is shown on the shoes of China's Lin Dan during a training session of badminton at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, Aug. 9, 2016. (AP
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