What musical instrument examination certificates are recognized by the state?

The examination certificates for musical instruments recognized by the state include: piano, guzheng, violin, pipa, erhu, zhongruan, cello, yangqin, flute, electronic organ (also known as double organ), clarinet, oboe, classical guitar, folk guitar, sheng, bamboo flute, trumpet, tuba, trombone and double bass. These examining organizations include: the China Conservatory of Music Examination, the Central Conservatory of Music Examination, the Music Association Examination, and the National Philharmonic Examination Committee.