UN Secretary-General Ban Ki-moon (C) receives a model of China's National Stadium, known as the Bird's Nest, during his visit to the stadium in Beijing, capital of China, July 2, 2008. Ban Ki-moon arrived in Beijing Tuesday afternoon, kicking off a three-day official visit to China at the invitation of Chinese government.(Xinhua/Li Tao)

UN Secretary-General Ban Ki-moon (C) visits China's National Stadium, known as the Bird's Nest, in Beijing, capital of China, July 2, 2008. Ban Ki-moon arrived in Beijing Tuesday afternoon, kicking off a three-day official visit to China at the invitation of Chinese government.(Xinhua/Li Tao)