Who is responsible for the backup power supply of the high-rise elevator in the relocated house?

Power failure in high-rise residential buildings means paralysis. It can be said that the big bottleneck of high-rise residential buildings is power supply. However, it is understood that there are few standby power supplies in the design and planning of Zhengzhou high-rise residential quarters, few generators for personal use, and few double-line power supply facilities. In fact, the national standard "Code for Fire Protection Design of High-rise Civil Buildings" strictly stipulates that civil residential buildings above 10 floor should be designed according to the second-class power load, that is, they should have dual power supplies (including shared power supply and standby power supply), that is, a "double-loop" power supply system. The power supply system should not be interrupted in case of power failure or line failure, but there is no clear law that elevators must be equipped with standby power supply.