The purple sand teapot has formed a standardized production rule after being passed down through several generations of artists, and can basically be divided into three categories in terms of shape structure. (1) Plain ware: namely square pots and round pots (2)ç‹patterned ware: namely pots with lines that are longitudinally, horizontally, and rotationally segmented (3) Shaped ware: namely pots with natural decorations, combined together.