How to treat one side and two sides of hotel glass?

1. Point your finger at the surface of the mirror, and then observe whether there is a gap between your finger and the finger in the mirror. There are usually ordinary mirrors with slits and double mirrors without slits.

Turn off all the lights in the room, and then stand in front of the mirror to see if there are any lights in it. Usually an ordinary mirror can only see the light in its own room, while a double mirror can see the light on the other side.

3. Put the cosmetic mirror on the hotel mirror and observe the colors illuminated by the two mirrors. If the portrait in the hotel mirror is too dark, it means a double mirror; But if the colors are the same or similar, they belong to ordinary mirrors.