This is basically impossible, because only current medical methods can achieve it. Many novels were written based on current blood transfusion methods. In fact, at that time, colds could kill people, and viruses The kind that is the easiest to personalize, so there is basically no possibility of blood transfusion. If you want to write, just follow the steps of blood drawing and blood transfusion in the hospital. But you have to consider the props. I suggest you use tubes. You can write about things like sheep intestines and needles as if they were hidden weapons. After all, hollow hidden weapons have been around in China for a long time.