Tempered glass is a deep-processed glass product. It is made by cutting, grinding, washing and drying flat glass (the term "flat glass" is provided by the industry encyclopedia) according to product requirements, then heating it (the term "heating" is provided by the industry encyclopedia) to a temperature close to the softening temperature of the glass, and immediately cooling it sharply. Tempered glass for construction is one of the safety glass products that is compulsorily certified by the National Certification and Accreditation Administration of my country. At the same time, the quality of the original glass used in the production of tempered glass should meet the requirements of the corresponding product standards, and the appearance quality defects of tempered glass caused by the inherent defects of the original glass should meet the requirements of the corresponding product standards. In daily cleaning, just wipe it with a wet towel or newspaper. A wet towel can wipe off most stains, and newspaper can wipe off water marks on the surface of the glass.