In ancient times, there was a man who was terminally ill. Because no one can cure it, his family is very anxious. One day, another doctor came. He is a foreigner. When he felt the patient's pulse, he felt hopeless, so he said that he was dead and the pulse was regarded as a living pulse doctor. Because it is a dialect, it sounds like a dead horse is a living horse doctor, which has been passed down to this day.