Chen Yuntao, wearing a horse head mask, kneels beside a billboard advertising 5 yuan ($0.8) rides on his back on a road in Hefei, capital city of East China's Anhui province April 13, 2015. Chen is trying to raise money to help his 9-year-old son, Chen Minghao, who has leukemia, because his family cannot afford the medical fees, which cost at least 400,000 yuan ($64,440) – a huge sum of money for an ordinary family. Many passers-by donated some money to help the poor father without taking up his offer of a ride on his back.[Photo/CFP]