1。 Inside, loosen the disc that clings to the door, and then turn it counterclockwise to make it retreat to the back.

2。 Then twist the hand-held part (that is, the ball) left and right a few times, carefully look at the small hole on it, insert a thin thing and hold it hard, and the ball can be pulled out.

3。 Take out the newly tilted disk and you will see two screws. Put them down and pull them out from the side outside the door.