How to install the lampshade in the hotel room when it is dropped?

If it is a mosaic lamp, you can see that there are two springs on the shell. Put the spring groove of the spring rail lamp holder in, and you can install the lampshade.

If it is a ceiling lamp, one method is to directly aim the shell at the lamp board and rotate the shell clockwise, and the other method is to install the shell with a handle on the lamp board and pull the handle to install the lampshade.