Brick is an artificial small building block, which is divided into sintered brick (mainly clay brick) and non-sintered brick (lime sand brick, fly ash brick, etc. ), commonly known as bricks. Clay brick is made of clay (including shale, coal gangue and other powders) as the main raw material, which is processed, shaped, dried and roasted by mud.

During the Spring and Autumn Period and the Warring States Period, China successively created square bricks and long bricks. During the Qin and Han dynasties, brick-making technology, production scale, quality and fancy varieties all developed significantly, and the world called it "Qinzhuan Hanwa".