mingsonjia: museum-of-artifacts: 300 year old abacus ring. The...

mingsonjia:

museum-of-artifacts:

300 year old abacus ring. The ring’s 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.

算盘  ”suàn pán”. Zhusuan is “the way of using suan pan to calculate”.