Cao Xiangfu, a five-star volunteer for China Bone Marrow Bank, donates hematopoietic stem cells at Shenzhen No. 2 People’s Hospital on Thursday. Cao is the first five-star volunteer at the bone marrow bank to donate hematopoietic stem cells and the second person in Shenzhen to have donated blood 100 times and have donated stem cells. Sun Yuchen
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