COPENHAGEN - Defending champions Chen Qingchen and Jia Yifan of China took a straight-game victory over Apriyani Rahayu and Siti Fadia Silva Ramadhanti of Indonesia in the Badminton World Championships women's doubles final here on Sunday, becoming the first women's pair to win four golds in the tournament's history.

The top seeds, playing their fourth final in six appearances at the worlds, took 41 minutes to wrap up the victory 21-16, 21-12, expanding their head-to-head record against the Indonesian duo to 5-1.

In the mixed doubles final held earlier, China's three-time champions Zheng Siwei and Huang Yaqiong were defeated by South Korea's Seo Seung-jae and Chae Yu-jung to finish with silver medals.

25-year-old Seo has the chance to win another title in the tournament as he will pair with Kang Min-hyuk in the men's doubles final later.