Six years ago, Wang Huanming was paralyzed from the neck down after being injured wrestling with a friend. Today, he hopes he has found the answer to walking again: a new body for his head. Mr. Wang, a 62-year-old retired gas company worker, is one of several people in China who have volunteered for a body transplant at a hospital in the northern Chinese city of Harbin.

The idea for a body transplant is the kind of thinking that has experts around the world alarmed at how far China is pushing the ethical and practical limits of science. Such a transplant is impossible, at least for now, according to leading doctors and experts, including some in China, who point to the difficulty of connecting nerves in the spinal cord. Failure would mean the death of the patient. FULL REPORT