The shower door was derailed. How to put it back?

Cheating. Look at the top and bottom of the door. There should be a gap on the upper edge and a track on the lower edge. Drag the middle of the door with both hands. The gap on the upper edge is pushed upward at the middle of the door frame, and the lower edge is squeezed inward at the lower part of the door frame. If it's almost done, you can use a screwdriver and other tools to make it a little bit and go in to see if it's flexible. For the sake of safety, it is suggested that when installing the shower door, a gap of 0.5 ~ 1cm should be reserved above the shower door plate, so that the vacancy of the door can be adjusted and the lack of oxygen in the shower can be avoided. The sliding door panel can also be replaced with a pull-type or roller-type door panel, so that the door panel can be opened at the first time in case of an accident.