Traditional Culture Encyclopedia - Hotel reservation - The hotel door was locked inside. Why can I open it directly without unlocking it? Does this lock work?

The hotel door was locked inside. Why can I open it directly without unlocking it? Does this lock work?

Mainly for security reasons.

1) It's locked inside, and it's difficult to open it outside, for the safety of the guests.

2) The inside is locked and can be opened directly, so that if there are some emergencies at home, such as fire, people inside can quickly open the door to escape.

Behind every humanized design, there will be a bloody lesson.