CHONGQING, Sept. 26 (Xinhua) -- Chen Yanyan from Team Guangdong became the first triple gold medalist at the national swimming championships after she won the women's 50 meters backstroke here on Wednesday.

    The 22-year-old Chen clocked 29 seconds, ahead of Asian record holder Gao Chang (29.54). Gao was 1.23 second behind her personal best.

    "Like my national teammates, I feel very tired after a series of competitions," said Chen, who had claimed the gold in 100 and 200 meters backstroke and reached Olympic A qualification standard in both events.

    "But I'm in good shape," she added. "I even got my personal best in the 100 meters race."

    Chen's result in the 100m event was 1:1.45, placed 25th in this year's world ranking. She won the 200 meters race in 2:12.68 on Tuesday, 0.79 seconds off her personal best.

    "I still have much more space to improve," said the backstroke specialist. "I might take training abroad for a period after the championships."

    In the women's 4x100 meters relay final, Zhao Jing, Tang Yi, Wang Dan and Pang Jiaying representing the national team were expected to cut a figure, but was disqualified as final leg swimmer Pang left the starting blocks too early.

    "I didn't know what's happened," said Peng after stepping out of the pool.

    Team Zhejiang clinched the title in a time of 3 minutes 47.13 seconds.

    Seventeen-year-old Yang Jieqiao took victory in the women's 400meters freestyle event in 4:10.67. The long-distance expert also won two national titles in the 10km marathon swimming this year.

    Jiao Liuyang took out the gold of women's 100 meters butterfly at 59.17 seconds, a time under the Olympic A qualification standard of 59.35 seconds.

    The 16-year-old also won the 200 meters individual medley on Tuesday, but revealed that she would concentrate on her main event of 200 meters butterfly ahead of the Beijing Olympics.

    Former Asian record holder Chen Zuo won the men's 100 meters freestyle final at 50.10 seconds, failing to meet the Olympic A qualification standard of 49.23 seconds.

    National team members Zhang Lin and Huang Shaohua trailed behind _ at 50.54 and 50.65 seconds respectively.

    World championships runner-up Wu Peng is expected to dominate the men's 200 meters butterfly race on Wednesday, the last competition day of the national meet.

    Pang Jiaying is expected to swim under 1:59.29 in the women's 200 meters freestyle event, so as to qualify for the event at Beijing Olympics.