1. The thickness of the wall must be enough to 30CM thick, if not, it is not recommended to make a niche. 2. The recommended depth of the alcove is 15-20CM, if it is too shallow, it has no practical use, and if it is too deep, it will lose its aesthetics. 3. The load-bearing wall cannot be transformed, not even drilling holes. Pay special attention to making niches in the bathroom: 1. The bathroom area is small, so it is necessary to consider what proportion of niches are suitable. 2. The design size of the slot should reach 5-10CM, so as not to hinder the bricklayer work. 3. The specific size of the niche should refer to the tile, and the actual size should be an integer multiple of the tile size and there should be no zero difference. 4. For the niches inlaid with tiles in the bathroom, the four frames should be designed with a 45-degree collision angle as much as possible. Do not use the outer corner decorative strips to seal the edges to show the most beautiful effect of the niche.