In the process of purchasing interior wall tiles, if you want to purchase wall tiles, you must listen to the sound of wall tiles. You can take a wall tile at random, hold it well, and knock it gently with your other hand. If the sound sounds crisp and loud, it means that such a wall tile is very good. If it sounds boring, such wall tiles may have quality problems during firing. In the process of purchasing wall tiles, we should also check the * * * performance of wall tiles. For example, some rooms don't come and go frequently in normal times, so you can choose wall tiles with low level of * * *. If you are in and out of a room frequently, you must choose a room with good * * * quality.