IKEA's square mirrors can be pasted on concrete walls. According to relevant information, we can make two holes in the wall near the two vertical sides at the bottom of IKEA's square mirror, then insert materials that can support the weight of the mirror and are not easy to damage the mirror glass, put the mirror in front, and stick enough foam tape on the back of the mirror to make the glass stick. In this way, there is a support under the mirror, and a large area of adhesive tape is attached to the wall on the back, so it will be fixed firmly.