How to judge the rotation and opening direction of ordinary door locks

Judging the rotation and opening direction of ordinary door locks;

The general rule is that turning the lock in the opposite direction is unlocking, and turning in the opposite direction is closing the lock.

For example, lock on the right side of the door, the right side is the nearest door edge, turn left, that is, turn counterclockwise, that is, unlock. If the lock is on the left side of the door, turn the lock clockwise.

In a word, which side of the lock, which side of the lock, the other side of the lock.