The Cap Sac Ceremony is an important ceremony in the life of every Dao man. Not only that, the Cap Sac Ceremony also contains profound humanistic meaning, the aspiration to rise up, to prove that the Dao man has matured, and that he is qualified to take on the responsibility of his clan and community.

The Cap Sac Ceremony, also known as the "Tu Cai" Ceremony of the Dao people, is often held in the first months of the new year. This is the day when Dao men are recognized as mature both physically and mentally, so they are very interested and respected. According to the Dao people's concept, this is a ceremony for the men of the family and clan to receive recognition from the gods, and at the same time, they can start their career as shamans after the ceremony.
As a mandatory ceremony of the community, the Cap Sac Ceremony of the Dao will be held in an open scope, which can be an individual or many individuals in the same family or clan. Or they will also hold the ceremony at the same time for many different families, clans and villages.
The Dao's coming-of-age ceremony is also divided into many different levels.

The first level will be granted 3 lamps with 36 soldiers; the second level will be granted 7 lamps and 72 soldiers; the third level will be granted 12 lamps and 120 soldiers. The coming-of-age ceremony with 3 lamps and 7 lamps will usually be held more frequently in the community. This will depend entirely on the needs and conditions of each family and clan. Meanwhile, the coming-of-age ceremony with 12 lamps is considered a larger level, so it is only held about once every twenty or thirty years.
The Dao people's initiation ceremony is held continuously with a series of important rituals, including: Ceremony to welcome teachers, Ceremony to offer lamps, Ceremony to take students to meet the Jade Emperor, Ceremony to ascend the altar to grant seals, Giving a Dharma name (negative name), Ceremony to welcome the horse image back and collect troops, Ceremony to walk on hot stones, Ceremony to burn votive papers and Ceremony to grant degrees.
After the initiation ceremony, each boy has three more fathers, who are also the three teachers who received the ceremony and gave him a negative name. From here, the teachers will be responsible for imparting the knowledge that every adult man must have, such as learning Dao Nom script, learning customary law, logic, communication rituals with ancestors, society...
After the ceremony at home, the procession will move to a large area where "Ma dai" - made of four pillars, with steps to go up for the boys to perform the final ceremony of dropping the dai; the procession of dropping the dai is likened to the birth of boys to become adults.
The Cap Sac ceremony, in addition to recognizing the maturity of men, is also an opportunity for the Dao people to remember their ancestors, better understand their ethnic origins, thereby raising awareness of preserving and conserving the good traditional cultural values ​​passed down by their ancestors.