Tile immediately on the head of tile, is a kind of building material, its more decorative or text, exposed on the eaves, can protect the building from wind and rain erosion, but also can play a certain decorative effect, has always been people's attention. It is made of clay and is generally semicircular or circular. [1]

Tile Dang was discovered very early, and has been unearthed in Luoyang, Linzi, Yanxia Capital and Fengxiang Yongcheng of Shaanxi Province. In the Han Dynasty, the use of tile tiles everywhere became more prevalent, and tile tiles were generally unearthed in larger Han Dynasty sites.