In the Regulations on Safety Training of Production and Business Units, it is stipulated that the safety training time for new employees in production and business units of hazardous chemicals shall not be less than 72 hours. This requirement aims to ensure that employees fully master the knowledge and skills of safe production and operation of hazardous chemicals. Through long-term training, employees can understand the nature, harm and protective measures of dangerous chemicals, and improve their safety awareness and ability to deal with emergencies.