In Vietnamese society, people gather together to form villages in rural areas, and guilds in urban areas. Villages and guilds have been forming since the dawn of the nation. These organizations have gradually developed for the population to be more stable and closer together. Each village and guild has its own regulations called conventions.
The purpose of these conventions is the promotion of good customs within populations. All the conventions are different but they are always in accordance with the state laws.
Approximately ten thousands such conventions are kept in the History Museum in Hanoi and in other museums throughout the country.