China's Cai Yun (R) and Fu Haifeng return a shuttlecock to Malaysia's Koo Kien Keat and Tan Boon Heong during the men's doubles final of the Badminton World Championships 2010 in Paris, France, on Aug. 29, 2010. Cai and Fu won the final 18-21, 21-18, and 21-14. [Xinhua/Zhang Yuwei]