China's Zheng Qinwen on her breakthrough at the age of 21: Liu Xiang's achievement inspires me a lot

Zheng Qinwen achieved a breakthrough following her gold medal finish in tennis women's singles. She said Liu Xiang, China's 110m hurdles Olympic champion in 2004, encouraged her. She watched Liu Xiang's interview a lot of times before her final game and they did a great job at the age of 21.