Due to the different types of operas applicable to the bangu, there are big drum chambers, middle drum chambers and small drum chambers in terms of specifications.
The small-bore plate drum has a diameter of only 5 cm in the middle of the drum, a height of 11.5 cm in the middle of the drum, and a diameter of 23.5 cm at the bottom of the drum. 
The large-bore plate drum has a diameter of 10 cm in the middle of the drum, a height of 11 cm in the middle of the drum, and a diameter of 24.5 cm at the bottom of the drum.
The middle-bore plate drum has a diameter of 8 cm in the middle, a height of 11.2 cm in the middle of the drum, and a diameter of 24 cm at the bottom of the drum. The pronunciation is between the large and small-bore plate drums. , and used in instrumental ensembles.

There are several kinds of flat drums, the drums have a large pitch and a small pitch, and they each play a different role. For example, the plate drum used in the Southern Jufan drum has a larger drum surface; the plate drum used in Peking Opera and other local operas has a smaller drum surface. On the board drum, the drum heart and the drum edge have different pronunciations.
When playing, you can make different sounds when you play with a tap (clicking the drum face with a drum stick) and using a full sign (hitting the drum face with a drum stick), combining the intensity of the intensity and the density of the drums. Outstanding drummers can often Make various changes.
When playing the board drum, hang the drum on the wooden frame and hit it with two rattan or bamboo drum arrows. ) or full arrows (hitting the drumhead flat with a drum arrow), the sound is different.