How to change ordinary anti-theft door lock into anti-lock

Generally, the AB lock can be reversed, both inside and outside. Under normal circumstances, the outer handle can only be lifted backward, not downward, and the inner handle can be lifted backward or downward, so you can use it with confidence. If this is not what I said, you can find a local lock changer to debug it at home. It's not very complicated, so don't disassemble it yourself, because there are many parts, which are easy to disassemble and not easy to recover.