Blood type refers to the type of surface antigens in the components of blood, usually blood type refers to the type of specific antigens on the red blood cell membrane, and is closely related to the human clinical. The ABO blood group is based on the presence or absence of antigen A and antigen B on the red blood cells, and blood is divided into four types. In China, 30% of the residents are type A, 30% are type B and 30% are type O, and only 10% are type AB. RH blood type is a blood type that has the same antigen as the rhesus monkey on the red blood cells of a person called RH positive. Among most Han Chinese, RH-positive patients are 99% and RH-negative people only account for 1%. If you go to the hospital for a blood type test, you can usually find out the ABO blood type and RH blood type for about 50 dollars.