China's Olympic 110m hurdles(110米跨栏)gold medalist and former world record holder Liu Xiang announced(宣布)his retirement(退役)on Tuesday, April 7．Liu Xiang started his way of      a hurdle player at the age of 13.And 19 years later he has to retire because of his__      foot injury.
As one of the best athletes(运动员) in China, Liu Xiang won the gold medal in the 110m hurdles at the 2004 Athens Olympic Games, becoming the first man Olympic champion in athletics in China. Later in 2006, Liu Xiang set the new world 110m hurdles record of 12.88 seconds in Lausanne, Switzerland.        at 2008 Beijing Olympic Games, Liu Xiang gave up the race of 110m hurdles because his feet hurt badly before the race. In 2012, Liu Xiang      the competition again for the same reason at London Olympics. Although Liu Xiang tried to overcome his injury and come back to competition, he did not succeed in making it and finally         to end his sports career(事业) officially at the age of 32.
In the announcement of his retirement, Liu Xiang showed his thanks          his family, coaches and friends. He said he thanked all the support he had when he won or lost given by them, and the support has always encouraged him to carry on,       big the challenge is.
Looking back at Liu Xiang's sports career, he has made great achievements in the event of 110m hurdles. He is a World Record Holder, World Champion and Olympic Champion. He is truly the pride of Chinese. As for the future, Liu Xiang plans to make his contribution to the youth sports development and         more activities that allow him to connect more with children in mountain areas. As said by himself, "Everyone has something that he wants to do. I have made a clear_         for the coming years. I believe          I want to do is something that is simple. Even if it's not big, I am sure that it can make a real difference."

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