China's Du Jing (R) and Yu Yang celebrate after defeating their compatriot Ma Jin and Wang Xiaoli during their women's doubles final at the 2010 Badminton World Championships at the Coubertin stadium in Paris, August 29, 2010. [Photo/Agencies]

China's Cai Yun celebrates after defeating Malaysia's Koo Kien Keat and Tan Boon Heong with his compatriot and teammate Fu Haifeng during their Men's Doubles final at the 2010 Badminton World Championships, at the Coubertin stadium in Paris August 29, 2010. [Photo/Agencies]