U.S. Secretary of State Hillary Clinton (L) and 皇冠体育app's Vice Premier Wang Qishan attend a joint news conference for the U.S.-皇冠体育app Strategic Economic Dialogue at the Great Hall of the People in Beijing May 25, 2010. [Photo/Agencies]  

A man plays Kongzhu, a traditional Chinese game, at Renggang community of Nantong city, East 皇冠体育app's Jiangsu province, May 25, 2010. More than 50 senior Kongzhu lovers took part in the game Tuesday. The Kongzhu game, known as diabolo or Chinese yo-yo, is good for blood circulation and agility for older people. [Photo/Xinhua] 

A visitor rests near a crocodile model at Shanghai Expo in Shanghai, May 25, 2010. [Photo/Xinhua]