Core contents of the rules: First, one-stop window service, establish three-level "one-stop windows for elevator installation services" at the city, district and street levels, uniformly accept elevator installation applications, and provide full-process services such as policy consultation, scheme design, approval agency, and construction coordination; Second, parallel approval system, implement parallel approval by departments such as planning, fire protection, housing and urban-rural development, and market supervision, and each department completes approval within the specified time limit; Third, reduced approval time limit, reduce the total approval time for elevator installation from 90 days to 30 days, of which the planning approval time limit is reduced from 30 days to 10 days; Fourth, tolerance acceptance system, for those with complete main application materials and missing secondary materials, implement "tolerance acceptance", and applicants can complete the materials within the specified time limit; Fifth, intelligent approval system, establish the Hangzhou intelligent approval system for elevator installation, realizing online handling of the whole process of application, approval and supervision.