No less than 24 hours. According to the company's appointment rules, new employees must receive safety education and safety training at company level, project ministerial level, team level and level 3 before taking up their posts. Level 3 safety training time shall not be less than 72 hours, and level 3 safety training time shall not be less than 24 hours before taking up the post. Safety training is a very important content in safety production management and an important means to improve the safety production quality of all employees. The so-called safety training usually refers to education and training activities aimed at improving the safety quality of safety supervisors, employees in production and business units and related personnel engaged in safety production.