The initial safety training time shall not be less than 48 hours, and the annual retraining time shall not be less than 16 hours. According to the information in the Safety Training Regulations for Production and Business Units, the primary safety training time for principals and safety production management personnel in coal mines, non-coal mines, dangerous chemicals, fireworks and firecrackers, metal smelting and other production and business units shall not be less than 48 hours, and the annual retraining time shall not be less than 16 hours.