Bulia is a musical instrument of the edge of the Nu nationality, but it is not a musical instrument that is usually played. It is a special wind instrument for the Nu nationality to report mourning. Its use has a unique meaning in a specific scene.

According to the folk customs of the Nu people, all married males with heirs who died of illness should blow the bamboo horn to report their mourning, but not for unmarried and murderous people. Depending on the age and identity of the deceased, the number of buri used is also different. One piercing for young adults, three piercings for people over 60 years old, and five to seven piercings for the death of village chiefs. The musicians are generally men whose parents have died, and it should be taboo if the parents are still alive. The Nu people practice burial. After the deceased is buried, the bamboo number used and the crossbow and other objects he used before his death are offered as sacrifices in front of the grave to show the burial. Bulia usually does not keep it, and it is forbidden to play. Only temporarily cut bamboo to make it before the funeral.