The special value of cord blood is that it contains hematopoietic stem cells that can rebuild the body’s hematopoietic and immune systems, which is important for the treatment of leukemia and other blood disorders and immune system diseases. Cord blood is the blood that remains in the placenta and umbilical cord after the fetus is delivered and the umbilical cord is disconnected. Cord blood contains a large number of hematopoietic stem cells, which are the seeds of blood cells. Red blood cells, white blood cells and platelets are all formed by differentiation of cord blood, and the regeneration rate of hematopoiesis is particularly fast. Cord blood stem cells can treat a variety of conditions, such as acute and chronic lymphocytic leukemia and congenital immunodeficiency diseases.