Dr. Xiao-yan, the head of the organ transplantation department at the Shanghai Jiaotong University's Yongzheng Children's Hospital, announces that a heart has been successfully transplanted into a blind man. The doctor explains that such a heart is a suitable donor because of its small size and the fact that it has a slit in the side of the heart's left pulmonary valve, which allows blood to flow freely into the recipient's heart. He also explains that the transplanted heart will not cause any damage to the body's normal function, as long as there are no changes in the patient's blood flow caused by the brain's death. After the doctor's remarks, the other doctors in the room cheer him up. Dr. Y. Yang, another of the hospital's leading doctors, explains that organ transplantation is a complex and time-consuming operation, and that it is necessary for the medical community in China to be