Wang, male, 42 years old, diagnosed on May 19, 1979. The patient experienced vomiting and diarrhea dozens of times within a day, leading to aversion to cold, curling up, cold reversal of hands and feet, inflexible tongue, faint speech, retracted penis, and faint pulse. Recalling Shu Chiyuan's statement: "This condition has not yet reached the stage of sweating and high breathing, it is still treatable, urgently administer Cold-Extremities Decoction with Ginseng, perhaps he will not die." At 14:00, the patient urgently took Cold-Extremities Decoction with Korean ginseng, accompanied by fluid infusion, and by 20:00 the diarrhea stopped. By 1:30 the next day, the hands and feet were warm, by 4:00 the patient felt restless and wanted to remove clothing and blankets, the pulse was faint on the surface and floating on the inside, by 5:00 the inflexible tongue and retracted genital disease were also resolved, and after two days of recuperation, he recovered. The period from 1:00 to 5:00, corresponding to the hours of Zi (子) to Yin (寅), is precisely the time when critically ill patients turn danger into safety.