Wang Chuanli, left, visits her son at a hospital in Weifang, East China's Shandong province, June 27, 2013, before an operation. Her son Ding Wei was diagnosed with uremia in 2010 and was told he needed a kidney transplant. The 51-year-old mother qualified to donate her kidney, but was told she would have to lose weight, from 75 kilograms to 55 kilograms, before they could operate. In May 2012, she began walking and running more than 10 kilometers a day and was able to lose the weight. [Photo/Xinhua]