An eight-year-old boy from eastern China put on 10kg in two months so he could meet the criteria to donate bone marrow and save the life of his father suffering from leukaemia, according to a newspaper report. Cao Yinpeng’s father was diagnosed in January, but was unable to find a bone marrow match, the Chongqing Times reported. He would only have lived another six months if he had not undergone the transplant, according to the article. His son was quoted as saying that he wanted to give his father a life, just as he had done for him. Chinese woman expected to regain eyesight after transplant using pig’s cornea The boy drew up a plan with his family in Xuzhou in Jiangsu province to gain weight and exercise to meet the minimum requirement of 45kg to produce enough blood. It included one hours brisk walking each evening as he was unable to do strenuous exercise. The boy started to prepare for the transplant in June and the operation was conducted smoothly in early July. Chinese couple give birth to three more sons to find lifesaving transplant match for sick first-born daughter His father is recovering well and the boy has learned to cook to help take care of him, the report said. Bone marrow donors should be aged between 18 and 45, according to the China marrow donor programme’s website, but exceptions have been made so younger donors can save relatives lives.