Action focus: first, rectification scope, full coverage of 120,000 elevators in Chengdu, strictly investigating unqualified maintenance, over-range operation, false records, jerry-building, low-price vicious competition (lower than 50% of market price); second, digital maintenance, mandatory use of electronic maintenance system, maintenance scan code check-in, full video, data upload, electronic signature, whole process traceable, monitorable, reviewable, eliminating "paper maintenance"; third, credit supervision, maintenance units credit classification (A-D), A level green channel, priority recommendation, D level suspend business for rectification, public exposure, owners scan code check credit to select service providers; fourth, elevator insurance, promoting elevator safety comprehensive insurance, covering accident compensation, maintenance cost, emergency rescue, premium government subsidy 30%, reducing enterprise risk; fifth, long-term mechanism, establishing joint law enforcement, information sharing, complaint reporting, blacklist system, violating enterprises joint punishment, industry ban. After 2 months of action, 78 violating maintenance units investigated, false maintenance decreased by 85%.