Drum tower and heavenly drum. The belly of the drum is round and closed, and the diameter of the drum surface is 2.97 meters. It is made of whole piece of unbraced cowhide, which is resistant to stretching and good in sound quality. The drum surface is drawn according to the geomantic compass, with innate gossip as the body and gossip the day after tomorrow as the use. The pine board on the drum body is 5 cm thick, tough and elastic, with a red background and painted dragons and phoenixes. Brass rings and nails are huge and exquisite. The internal steel bars are pulled and reinforced, without deformation or cracking. Inside, there are two huge gongs to add sound and polish. The drum stand is 80 cm high, with five colors of imitation copper, which is steady and generous.