There is a plot in < < the legendary swordsman > >: after Ling Huchong was injured and lost blood, the followers of the Five Immortals sect sucked blood with leeches, and then put the leeches on Ling Huchong to let him spit out blood to enrich his blood. It has long been a simple idea for people to enrich the blood with blood if they lose too much blood. The discovery of blood type comes from the desire and continuous practice of blood transfusion. In real life, the first attempt at intravenous blood transfusion was made by foreign doctors in the late 19th century. They directly connected the blood vessels of the blood donor and the blood recipient for Read More …