Developed in the Qing Dynasty era(1644-1911), the ring features a 1.2cmlong, 0.7cm wide abacus thatsits on the finger.
这款产品于清朝研发出来,戒指上包含着一个1.2厘米长、0.7厘米宽的算盘。
The Zhusuan, or China's abacus, has seven rods with seven beads on each rod.Despite its small size, the rings still works as a counting tool, allowingtraders to make quick calculations.