How many times does the Central Conservatory of Music test drum sets a year?

The drum set of the Central Conservatory of Music is tested four times a year.

According to relevant data, drum sets of the Central Conservatory of Music are tested four times a year in Beijing, and the number of examinations varies from place to place, subject to local notice.

Drum set, namely jazz drum, is a very important percussion instrument in jazz band. Drum sets were formed in the 1940s, including hand percussion instruments and foot percussion instruments with different timbres.