China also emerged victorious in the women's singles, where Zhang Ning defeated countrywoman Zhou Mi 11-0, 11-8 to win her second crown here.
Chen Hong recovered from a poor start to demolish his practice partner Chen Yu in the final two games of their title match.
"We practise together all the time. So I was confident of winning the final," said Chen Hong.
"But he attacked very well in the first game and that surprised me a little. However, I was able to up the tempo in the second and third game."
Zhang, who had never beaten Zhou in eight previous international
"I played an attacking game from the start but did not expect to win the first game 11-0," said Zhang.
"In the second I was unable to maintain the pace and Zhou stayed close. But I managed to win the game and avoid a decider.
"I am sure if the match had gone to a third game, Zhou would have made me pay."
In the third all-Chinese final of the day, fifth seeds Yang Wei and Zhang Jiewen outduelled Gao Ling and Huang Sui 17-16, 15-7 to claim the women's doubles.
The men's doubles final was an all Danish affair. Top seeds Jens Eriksen and Martin Lundgaard overcame Lars Paaske and Jonas Rasmussen 15-9, 15-10.
