Panda blood generally refers to Rh-negative blood, and cord blood can be preserved. Cord blood is a portion of blood left in the umbilical cord of a newborn baby after the cord is tied, and it contains certain hematopoietic stem cells. If the child suffers from certain blood system disorders, the stem cells in the cord blood can be used for transplantation. Rh-negative blood is rarer and there is an option to preserve the cord blood. You need to contact the relevant storage organization before delivery and preserve the cord blood at the time of delivery. Cord blood needs to be stored in a low-temperature state, the storage requirements are relatively high, it is not possible to store it on your own, and the cost of storing it in a storage organization is relatively high, so you can choose to preserve cord blood if your financial situation permits.