Not less than 32 hours. Training time for safety production management personnel: the initial safety training time for the principal responsible persons and safety production management personnel of production and business operation units shall not be less than 32 hours. The annual retraining time shall not be less than 12 class hours. The primary safety training time of the main person in charge of the production and business operation entity and the safety production management personnel shall not be less than 48 hours, and the annual retraining time shall not be less than 16 hours.