AB blood type is not panda blood, panda blood is RH negative blood. Because the blood group system of human body is commonly used in clinical practice, there are ABO blood group system and RH blood group system. ABO blood group system is decided according to whether the red blood cell membrane contains A antigen and B antigen. The ABO blood group system is based on the presence of A antigen and B antigen on the red blood cell membranes, and those containing A antigen are type A blood; those containing B antigen are type B blood; those containing both A antigen and B antigen are type AB blood; those without A antigen and B antigen are type O blood. It is called panda blood.