China's Chen Jin went one better than last year to lift the men's singles world badminton title overnight, subduing Indonesia's Taufik Hidayat 21-13 21-15 in the final in Paris.
His victory highlighted a brilliant day for China who for the first time since 1987 took all five titles.
Chen had finished runner-up in 2009 when he lost to compatriot Lin Dan but Lin was beaten this time round in quarter-finals, leaving centre stage for Chen.
In an all-Chinese women's singles final, seventh seed Lin Wang beat Wang Xin, seeded three, 21-11 19-21 21-13.
The mixed and women's doubles were also China-only finals with Zheng Bo and Ma Jin winning the former and Du Jing and Yu Yang the latter.
The men's doubles pair of Cai Yun and Fu Haifeng, defending their 2009 title, beat Malaysia's Koo Kien Keat and Tan Boon Heong in three sets.
The result meant Malaysia remain without a world title since the tournament was first staged in 1977.