China dominated the start of competition at the London Olympics on Saturday amid a day of disappointment for US swimming star Michael Phelps and Britain's fancied cycling team, dpa reported.
The powerful Chinese contingent picked up two swimming golds, one of them with the first world record of the Games, and took top honours in women's weightlifting and shooting.
Chinese swimmer Ye Shiwen, 16, came from behind to win the women's 400 metres medley in 4 minutes 28.43 seconds, beating Stephanie Rice's record from 2008 by more than one second.
Ye's gold was the second of the night for China as Sun Yang had earlier become the first male swimmer from his country to win a gold medal when he won the 400m freestyle in Olympic record time.