First, I watched a video on the Internet some time ago. A barefoot doctor pricked a hole in a person's forehead with a needle, and then took a basin of blood with a basin. I feel very shocked. This is not bloodletting, just like running water. The man didn't act terrible, just said it was normal health. I think this man is possessed by a ghost. Putting a basin of blood is not health preservation. It seems that quack is the most confusing, and this person probably really believes this folk prescription.
Second, Chinese medicine actually has bloodletting therapy, but this is not the case. The part of bloodletting therapy is actually the superficial vein part of the human body, while the arterial blood is put in the video because the venous blood pressure is not so great. Bleeding therapy in traditional Chinese medicine usually releases a few drops or 2~5 ml of blood. And the video is obviously dozens of times. So bloodletting therapy really exists, but it must be done in a regular hospital. Moreover, the amount of blood released must not be too much, otherwise it is likely to lead to sudden death.
Third, bloodletting therapy is particularly demanding, and ordinary people should not try it easily. Many Chinese doctors say that bloodletting therapy can solve many diseases as long as it is exercised properly, such as headache, which is caused by blood stasis, so bloodletting therapy can cure headache, so bloodletting therapy still has its role, but it has been misinterpreted by some people.