The Dragon Boat Festival in Vietnam is the fifth day of the fifth lunar month, also known as Zhengyang Festival. There is a custom of eating zongzi on the Dragon Boat Festival, and there is also a custom of expelling insects on the Dragon Boat Festival. On the morning of the festival, parents prepare sour food and fruits such as glutinous rice wine, glutinous rice with yellow ginger, peaches, plums and lemons for their children. In some areas in the south, children are allowed to eat watermelons, mangoes, boiled eggs and coconut juice, while adults drink realgar, which is applied to children's heads, foreheads, chests and navel to repel insects. In many areas, children dye their fingers and toes with henna and wear amulets woven by wizards with five-color ropes to ward off evil spirits. Families with few children or sickly will wear such clothes in the morning before the festival to ward off evil spirits. Collecting herbs during the Dragon Boat Festival is an essential activity. People think that "Dragon Boat Festival Herbs" are the most effective, and many markets have drug monopoly booths.

"Eat zongzi for a bumper harvest", and Vietnam also celebrates the Dragon Boat Festival on the fifth day of the fifth lunar month. Their main content is to eat zongzi and repel insects during the Dragon Boat Festival. Parents will prepare a lot of fruits for their children and wear auspicious symbols woven with colored threads. Adults will drink realgar wine and apply it to children to repel insects. In addition, Vietnamese believe that eating zongzi can get good weather and good harvest. "Tie five-color silk thread", the first important thing for Vietnamese adults after getting up in the early morning of the festival is to tie five-color silk thread on their wrists, ankles and necks. Children are not allowed to talk when tying the thread. The five-color line cannot be broken or discarded at will, and can only be thrown into the river during the first heavy rain in summer or the first bath. It is said that children wearing five-color thread can avoid the harm of snakes and scorpions; Throwing it into the river is to let the river wash away plagues and diseases and make children safe and healthy.

"Wearing a sachet", a sachet worn by children during the Dragon Boat Festival, is said to have the meaning of ward off evil spirits and plague, but it is actually used to decorate the inner head. The sachet contains cinnabar, realgar and fragrant medicine, wrapped in silk cloth, and the fragrance is overflowing, and then tied into a rope with five-color silk thread to make a string of different shapes, all kinds of exquisite and lovely.

Festivals are an encyclopedia of social life. There are all kinds of activities in festivals, and the contents of festivals are all-encompassing, which largely reflect the different aspects of the material life and spiritual life of people in a nation or a region. Festivals are a mirror, which allows us to understand the history and culture of a nation from one side and deepen our understanding of this nation. Like other ethnic groups, Vietnamese festivals are the product of a certain historical period and have their own characteristics. Understanding the festival customs in Vietnam is helpful for us to better understand this nation and its internal culture.