How to open the fire door lock in the corridor without a key?

According to its normally open state, fire doors can be divided into three types: one is usually open and automatically closes in case of fire, which is called normally open fire doors.

One is usually closed. When someone walks, the door should be pushed open, and then it will automatically close under the action of the door closer or return to the closed state. This is called a movable fire door.

The other, usually closed, only authorized personnel can enter, and automatically release the fire door to let people pass in an emergency, which is called normally closed fire door.

You can drive without a key.