BEIJING, Oct. 11 (Xinhua) -- Lin Dan knocked out Chinese compatriot Liu Yuchen 21-7, 21-7 to advance into the men's singles quarterfinals at the 2007 International Badminton Tournament here on Thursday.

In the 18-minute two sets, Lin Dan stamped his world No. 1 authority by taking a 14-point lead in the first set and had a complete control of the second with powerful jump smashes and varied shuttles to secure the win.

"My opponent Liu Yuchen is rather young, he needs more training," said Lin after the match, adding that the airing facility of the gymnasium is the best he ever experienced.

China's second-seeded Bao Chunlai and Vietnamese fourth-seeded Nguyen Tien Minh are other medal contenders for the men's singles on Oct.14.

Along with the men's singles and women's singles, the men's doubles, women's doubles and mixed doubles are also being held in three courts on Oct.10-14 at the Beijing University of Technology (BUT) Gymnasium, the badminton venue for 2008 Beijing Olympics.