The sound of bier is called dalgong sound, while the sound of bier in Bonghyeon-ri, Gongju, is called dalgong sound. Gongju-si was the administrative center of Chungcheong-do during the Joseon Dynasty, and the custom was developed due to the tradition of Yangban-gun's failure. In Gongju, a bier managed by the government office, Yeokdamjaeng, was introduced, and the sound of Dalgong, a princess, was passed down in Bonghyeon-ri 200 years ago.

Gongju's bier sound is composed of bier sound, sinmun sound, component phlegm sound, and dalgong sound. There are eight kinds of bier sounds, including the sound of the main gim, the chorus of the chorus, and the sad and long jinsori of Chungcheong-do dialect, and the lyrical lyrics of the folk songjo are the main ones. The sound of phlegm gathering the soil of the tomb is the sound of scrotum and frequent sounds of gin and fast bier. The sound of dalgong is composed of four types: the sound of donation, jindalgong, jajundalgong, and saddle sound.

Bonusori in Bonghyeon-ri, Gongju, has been handed down from more than 200 years ago and has an important meaning.