0-4℃ for 3-5 hours. You can first wash the meat to absorb water, then put the meat on the plastic wrap, then pinch the two ends of the plastic wrap tightly, take a clean cotton cloth, wrap the meat and put it in the refrigerator for refrigeration or freezing. It is the most reasonable time to set the temperature time of the acid discharging bag at 0-4℃ for 3-5 hours. Generally, pork can be discharged after refrigeration for 3-5 hours, and beef and mutton can be discharged after refrigeration for 5-7 hours.