Should not be long to open "Mini Air Cooling Fan", turn fans for too long, the body will produce discomfort phenomenon. With the large body temperature will reduce the evaporation of sweat and the passage of time, it is easy to cause colds, abdominal pain, diarrhea and other symptoms, should be appropriate to open the recommended open time of 1 hour is appropriate. Correct placement is also important from the human body should not fan too close, too close hair so that the blood circulation and sweat circulation gap is too large, the nerve center will lose its balance, once the time is too long, the various organs of the body will feel tired, so the body feeling unwell.