Eating betel nut is a common practice in tropical Asia and Oceania. People chew a mixture of betel leaves and areca leaves in their mouths to secrete water. This is considered a way to freshen the mouth and is a etiquette in some Southeast Asian countries. Chewing betel nut has been a habit of a part of Vietnamese women since ancient times. Usually, it's people in middle age, old people. In addition, eating betel nut also shows communication culture in the countryside. When women visit your house, they are offered a piece of betel nut, then they talk and talk. Today, the people who eat betel nut are less and less, mostly only old people in the countryside still keep this custom. . If you go to the countryside of Vietnam, you will easily see the image of old people sitting and chewing betel nut while telling stories to their children and grandchildren in a very simple way.