Core contents of the blue book: First, operation safety management system, clarifying the safety management requirements for elevator on-site operations, establishing a whole-process safety management system of "pre-operation risk assessment, in-operation process control, post-operation acceptance and summary", and implementing the safety responsibilities of operators, on-site responsible persons and safety management personnel; Second, safety specifications for various operations, respectively standardizing the safety processes and requirements for elevator installation operations, maintenance operations, transformation operations and inspection operations, and clarifying the special safety regulations for dangerous operations such as high-altitude operations, live operations, hot work and confined space operations; Third, risk identification and prevention and control measures, sorting out 128 common safety risks in elevator on-site operations, formulating specific prevention and control measures and emergency disposal methods for each risk, helping operators identify and avoid risks in advance; Fourth, safety protection articles and equipment, clarifying the types, specifications and use requirements of safety protection articles and equipment that must be equipped for elevator on-site operations, requiring operators to correctly wear and use safety protection articles; Fifth, accident emergency disposal, standardizing the emergency disposal processes for common accidents in elevator on-site operations, including emergency rescue methods for accidents such as falls from heights, object strikes, electric shocks, mechanical injuries and fires, and clarifying the accident reporting procedures and requirements.