Chen Ruolin of China is seen during a diving training session at the Aquatics Center before the start of the London 2012 Olympic Games in London, July 24, 2012.

　　China swimmers stretch after a training session at the Aquatics Center before the start of the London 2012 Olympic Games in London, July 24, 2012.

　　Chinese swimmers perform strength exercises at the Aquatics Center in the Olympic Park in Stratford in east London July 24, 2012.

　　Qin Kai of China practises at the Aquatics Center in the Olympic Park in Stratford in east London, July 24, 2012.

　　Chinese table tennis player Xu Xin trains in London's ExCel arena on July 24, 2012 for the London Olympic Games' table tennis competition that starts on July 28.

　　Chinese badminton player Lin Dan in pregame training at the Wembley Stadium in London on July 24, 2012. Lin prepares for the Games' badminton competition that starts on July 28.