Because it is now a mutual aid blood donation, according to the blood donation law, blood should be donated at intervals of 6 months, 400ml or 200ml of blood at a time, up to a maximum of 400ml of blood. Within such a cyclical range, blood donation does not have a particular impact on the individual’s body. The human body has a blood production process, for example, women will have bleeding once a month, i.e. menstruation, and the volume of menstruation can sometimes reach 80ml. Women have a stronger blood production function than men, so donating 200ml of blood at a time will not have too much impact on the body. Blood donation plays a key role for patients who need blood supply, so we urge everyone to donate blood as much as they can.