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Video - Chinese pair take badminton gold
China's Du Jing and Yu Yang eased past South Korea's Lee Hyojung and Lee Kyungwon in the women's doubles to take the first badminton gold of the Games.
Du and Yu won 21-15 21-13 as the South Koreans failed to recover from an early injury to Lee Kyungwon.
The victory for China's second seeds reassured a roaring home crowd, who saw top seeds Yang Wei and Zhang Jiewen go out at the quarter-final stage.
Another Chinese pair, Zhang Yawen and Wei Yili, won the bronze play-off.
The competition's third seeds reached the podium with a 21-17 21-10 victory over Japanese pair Miyuki Maeda and Satoko Suetsuna.
China have now won gold in the women's doubles for the fourth straight Olympics, and the victory sets in motion the hosts' plan for a clean sweep of this year's badminton medals.