Legal basis: Opinions on Implementing the Work Guide to Contain Serious Accidents and Constructing the Double Prevention Mechanism of Classified Management and Control of Safety Risks and Investigation and Management of Hidden Dangers. First, strive to build a dual prevention mechanism for enterprises. All regions guide and promote all kinds of enterprises to formulate scientific safety risk identification procedures and methods, and organize experts and all employees to identify safety risks in production technology, equipment and facilities, working environment, personnel behavior, management system and other aspects in an all-round and whole process. Scientifically evaluate the security risk level, establish the enterprise security risk database, and draw the four-color security risk spatial distribution map of the enterprise. According to the evaluation results, the safety risks are effectively controlled from the aspects of organization, system, technology and emergency response to ensure that the safety risks are always under control. Establish and improve the safety risk announcement system, strengthen risk education and skills training, set up safety risk bulletin boards in key areas, and make post safety risk notification cards. Establish and improve the hidden danger investigation and management system to realize closed-loop management of hidden danger investigation and management.