06 August,2012 10:16 AM IST | | AFP
Dan battled back from a game down to win 15-21, 21-10, 21-19 to become the first men's singles player to win the Olympic title twice.
Shortly afterwards, Cai Yun and Fu Haifeng won the men's doubles final 21-16, 21-15 against Denmark's Mathias Boe and Carsten Mogensen, clinching the fifth and last badminton title for China.
China's team had been rocked when women's doubles top seeds Yu Yang and Wang Xiaoli were among eight players disqualified in a match-throwing scandal which prompting a public apology from their head coach, Li Yongbo. But they won the women's doubles regardless, as well as the mixed doubles and the women's singles, through Li Xuerui in an all-Chinese final, to become the first country to win all five since badminton's Olympic debut in 1992.