China's Li Zhesi fails doping test

BEIJING -- Chinese state media say a swimmer who was part of the country's winning team at the 2009 world championships has tested positive for doping.

The official Xinhua News Agency said Saturday that 16-year-old Li Zhesi tested positive for a performance-enhancing drug EPO in March.

Li is one of the swimmers who won gold in the 4x100m medley relay event at the worlds in Rome. Li also won the 50-meter freestyle event at the 2010 Asian Games in Guangzhou.

EPO is a hormone that boosts the body's production of red blood cells.

China has spent the past decade rebuilding its swimming program following a series of doping scandals that devastated the sport in 1990s.