Key requirements: First, signal coverage, full coverage of three major operators' signals in new elevator cars before delivery, no blind spots; Second, machine room temperature control, mandatory installation of air conditioners/fans, automatic alarm for over-temperature; Third, old elevator control, annual safety assessment for elevators over 15 years old, immediate suspension for serious hidden dangers; Fourth, maintenance publicity, maintenance unit, personnel, phone and records publicized in cars; Fifth, violation penalties, unqualified new elevators prohibited from delivery, maximum fine 100,000 yuan.