First, move the patient quickly to a warm and sheltered place where the temperature should be above 25°C to shorten the freezing time. Then, immediately wrap the patient’s whole body with a dry blanket or quilt and apply a hot water bag to the torso, axilla and groin. The temperature of the hot water bag should not be too high to prevent burns, 40°C to 50°C is appropriate. Finally, send the patient to the emergency department for medical attention as soon as possible or call 120 emergency number urgently.