Chinese players underlined their dominance in all but one of the finals of the Korean Open in Seoul.
Lin Dan won the men's singles title, beating Chen Jin 21-14 21-19, while Xie Xingfang took the women's singles crown, seeing off Zhu Lin 21-14 21-7.
In the mixed doubles, Danes Thomas Laybourn and Kamilla Rytter, who beat Nathan Robertson and Gail Emms in the semis, failed to halt a Chinese sweep.
They lost 22-20 21-19 to China's Gao Ling and Zheng Bo.
In the women's doubles final, top seed Gao Ling and Huang Sui beat their second-seeded compatriots Yang Wei and Zhang Jiewen 12-21 21-14 21-16.
Only in the men's doubles final were China not represented, with Jung Jae-Sung and Lee Yong-Dae defeating fellow Koreans Lee Jae-Jin and Hwang Ji-Man 21-16 21-15.