What is the locking state of Yongri elevator?

It is the state that the elevator is locked and cannot run. Elevator locking of Yongri elevator generally occurs when the elevator is in trouble, repair or maintenance. In order to ensure the safety of passengers, the elevator will be locked and forbidden to use. When the elevator is locked, the elevator door cannot be opened, the button cannot be used, and the elevator cannot enter. Only after the maintenance personnel release the locked elevator state can the elevator resume normal operation.