If you have a disease that requires a bone marrow transplant to cure, you need to make the following preparations before the transplant: 1. For a match between relatives, only 3-5 ml of EDTA anticoagulated blood needs to be drawn, and the report can be issued in 2 days at our hospital. 2. If there is no match between relatives, you can find a donor in the bone marrow bank. It takes 2-3 months. 3.If there is no fully compatible donor, you can choose semi-compatible bone marrow transplantation. Both parents and children are semi-compatible, and there is a 50% probability that the child treatment is semi-compatible, so almost everyone has a semi-compatible donor.