A 19-year-old student of Hubei Xiangyang No 1 high school donates his hemopoietic stem cells to a 4-year-old leukemia patient at PLA Navy General Hospital in Beijing, March 26, 2012. Zhang Wenchi is in his senior year of high school and he gave up time preparing for the National College Entrance Examination (NCEE) to donate his stem cells. Zhang is the youngest and the first high school student to donate stem cells. The college entrance examination starts from June 6 to June 7 this year. [Photo/Asianewsphoto]