Recently I have been asked by many parents of children with complex congenital malformations before surgery about allogeneic hand transplants and 3D printed hands. This shows that parents are now paying attention to high technology and reading a lot of medical books. But here I would like to throw some cold water on these parents, it is not realistic. 3D printing is a popular technology and there is research at the forefront, including implants and blood vessels and cells can be printed, but with biological function and activity. It is still only in the laboratory stage. Since it is parents who are reading this short article, I will give a simple example here. Every child has the potential to become Liu Xiang, but Liu Xiang is eliminated from the millions of children who could become Liu Xiang. We only see a successful Liu Xiang, but we don’t know how many people are with him to bear the failure. Parents subjectively and emotionally want their children to have a pair of sound hands and feet, while doctors are objectively and rationally technically restoring the child’s maximum function and appearance.