This is a decoration accessory, which is mainly used in corners or some edge parts. Its use can effectively solve the common quality problems that exist for a long time in the construction, such as the external angle is not straight, unsightly, and the wall corner is easy to be damaged. Generally speaking, the material of this kind of auxiliary material is relatively weak, and the patterns are also diverse, which can not only play a certain decorative role, but also protect us from bumps.