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People practise Taiji in front of the National Stadium, also known as the Bird's Nest, in Beijing, capital of China, Aug. 8, 2009. (Xinhua/Guo Yong)

People practise Taiji in front of the National Stadium, also known as the Bird's Nest, in Beijing, capital of China, Aug. 8, 2009. (Xinhua/Guo Yong)