Aerobics certificate refers to the national aerobics instructor's professional and technical certificate, which is divided into national, first-class, second-class and third-class * * *, and graded management and training are implemented. The training, examination and approval below the first level are managed by local sports administrative departments below provinces and cities, and the graded training of aerobics instructors is systematic training from primary to advanced. Aerobics instructor grade certificate is the qualification certificate of full-time and part-time aerobics instructors nationwide, and the national aerobics instructor certificate is valid for two years.