As a special wind instrument for the Nu people to report mourning, Bulia has its own characteristics in the way of playing and the timbre.

When Bulia plays, he holds the resonator in his left hand and the blowpipe in his right hand, inserts the open end of the blowpipe into the resonator, and places the blow hole between the lips to play. Only one sound is issued, and its sound is "beep", with no fixed pitch. The timbre is rich, the volume is loud, and it spreads far. Moving the resonator can make the bamboo horn make a gliding sound, and its sound is more sad. Used in folk funeral activities, it is a special wind instrument for the Nu people to report funerals.