Participants of a running race pose for photos in the newly renovated walkways on the roof of the National Stadium, also known as the Bird's Nest, in Beijing on Saturday, February 11, 2017. (Photo/people.cn)
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Participants of a running race pose for photos in the newly renovated walkways on the roof of the National Stadium, also known as the Bird's Nest, in Beijing on Saturday, February 11, 2017. (Photo/people.cn)
