5.5/5.5cm Jianzhan Tenmoku Tea Cup-Master Cup Description Jianzhan(also known as Tenmoku pottery) is originating in the Song Dynasty,use as tea bowl(Chawan).Jianzhan from Jianyang, Fujian,China,where is source area Jianwares since Song. The rich iron content clay is helpful to soft water, it is widely use to drinking tea and liquor.