Core upgrade contents of the standard: First, expanded component scope, adding scrapping standards for new components such as intelligent monitoring systems, variable frequency drive systems, and handrail drive devices; Second, tightened scrapping conditions, raising the scrapping requirements for core components such as steps, handrails, drive hosts, and brakes; Third, special requirements for public transport equipment, formulating stricter scrapping standards for public transport heavy-duty escalators and moving walks; Fourth, scientific judgment methods, adopting a comprehensive judgment method combining appearance inspection, performance testing and non-destructive testing; Fifth, standardized scrapping processes, unifying the application, inspection, judgment and disposal processes for component scrapping of escalators and moving walks.