Bone marrow donation is basically harmless to the donor’s body because the blood system has a strong hematopoietic and reserve function, i.e. bone marrow donation does not cause damage to the donor. Currently, the state is also calling for volunteers to participate in bone marrow donation, and many volunteers have signed up, so the Chinese Bone Marrow Bank is collecting more and more bone marrow from volunteers. In the past, the bone marrow was basically drawn and then the stem cells were collected, but now it is simpler to mobilize the stem cells directly in the peripheral blood by giving a leukemia boosting injection, and after mobilizing the stem cells, the stem cells are collected through a blood cell separator. The bone marrow reserve function is very strong, so there is no need to worry about how much damage is done to the donor after the stem cell collection, there is basically no damage.