For the safety of the safe deposit box, many people will set a very complex safe deposit box. Then, after a period of time, you may forget the box password. Safe deposit box password is relatively long, it is not easy to remember, easy to forget the password.
General safe box will be equipped with an emergency key, there is the main key and password to open, when there are special circumstances, you can use the emergency key to open. We must pay attention to, don't put the emergency key on safe box.