Preserving the baby’s umbilical cord blood has the following benefits. Firstly, it can be used as a source of hematopoietic stem cells for transplantation, because if the infant suffers from bone marrow hematopoietic disorders in the future, there will be a need for hematopoietic stem cell transplantation, such as when the child suffers from acute leukemia or aplastic anemia, etc., and the hematopoietic stem cells in the umbilical cord blood can be applied to treat the illness if the umbilical cord blood is preserved. Secondly, hematopoietic stem cells can be transplanted between relatives. If the infant’s immediate family members are suffering from malignant tumors, hematopoietic stem cells from the infant’s umbilical cord blood can also be used for treatment.