When people get sick, the first thing they will do is to go to see the doctor and then take the medicine. Taking the medicine makes them feel safe, so some will keep taking medicine every day. Actually, no matter what kind of medicine, it is kind of poison. The news has reported that the oldest man in the world and then experts tried to find the secret of live long. They found the man lives the simple life and stay away from the city, then he barely got sick. If he caught the cold, he would not take the medicine. What’ more, the man have the food he grows and though he was old, he still kept working. The experts came to the conclusion that the secret of living long is to keep good mood and take exercise, what else, staying away from taking medicine often.