Core contents of the measures: First, blockchain full-process traceability system, establish an elevator full life cycle traceability platform based on blockchain technology, store all full life cycle information of elevator design documents, production and manufacturing information, installation and commissioning records, supervision and inspection reports, regular inspection reports, maintenance records, fault records, emergency rescue records, transformation and overhaul data, and scrapping and cancellation data on the chain, with information immutability and full traceability; Second, full coverage requirements for smart supervision platform, by the end of 2027, all in-service elevators in the city must be connected to the Changsha elevator smart supervision platform. New elevators must be equipped with blockchain IoT monitoring devices and connected to the platform simultaneously. Existing elevators must complete transformation and installation before the end of 2027. Elevators not connected to the platform will not pass the regular inspection; Third, intelligent supervision function, the platform collects elevator operation data in real time through blockchain IoT devices, the AI algorithm automatically identifies safety hazards, and pushes early warning information to maintenance units, user units, and supervision departments in real time, realizing "early warning and early disposal"; Fourth, intelligent emergency rescue, the platform realizes automatic alarm, automatic positioning, automatic order dispatching, and full tracking of elevator entrapment. The average arrival time of trapped rescue is no more than 25 minutes, and the whole rescue disposal process is traceable on the chain; Fifth, public inquiry and supervision, the blockchain traceability QR code is publicized in the elevator car. Owners can view the full life cycle information, maintenance records, inspection reports, and fault records of the elevator by scanning the code, and can submit complaints, reports and fault repairs through the QR code to realize social public supervision.