A bird's eye view of the National Stadium, also known as the Bird's Nest in Beijing, from the newly extended walkways on its roof, on Saturday, February 11, 2017. (Photo/people.cn)
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A bird's eye view of the National Stadium, also known as the Bird's Nest in Beijing, from the newly extended walkways on its roof, on Saturday, February 11, 2017. (Photo/people.cn)
