Yes Class C badminton coaches of the National Sports School Federation are trained and certified by the National Sports Federation, initiated by the State Sports General Administration and registered by the Ministry of Civil Affairs, so this coaching certificate is useful. Badminton coach mass grade C is to distinguish professional badminton coaches from non-professional badminton coaches. The Chinese Badminton Association takes "mass grade" as the unified title of amateur coaches, which is subdivided into A, B and C grades. ..