Ask an expert to show you how to secretly put something on the gossip mirror across the hall to make it invalid.

Find a piece of red paper, one foot long and five centimeters wide. It says: God bless the people. Stick it on your house, and his mirror will become a decoration, which is useless at all. You ask him to take a hard photo. If he still takes pictures, you can hang a red cloth on the door. Red cloth breaks the gossip mirror, and the mirror can't get in. You'd better put a red paper on the door, and God bless the people.