The drum frame is made of wood, in the shape of an oblate shape, covered with cowhide or sheepskin on both sides, and the edges of the leather surface are fixed with drum nails. Sizes vary, the larger drum face diameter is 30 cm and the drum frame height is 8 cm; the small drum head diameter is 22 cm and the drum frame height is 6 cm. Guchu, also known as Gujianzi, is made of bamboo and is 24 cm l...