Suanfa tongzong
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Suanfa tongzong is a mathematical text written by sixteenth century Chinese mathematician Cheng Dawei and published in the year 1592. The book contains 595 problems divided into 17 chapters. The book
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Suanpan
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The suanpan, also spelled suan pan or souanpan is an abacus of Chinese origin. The earliest known written documentation of the Chinese abacus dates to the 2nd century BCE during the Han dynasty, and i
Chinese Abacus
A modern 4+1 suanpan (soroban) with a clear-all button
Suanpan on the apothecary's counter in Along the River During the Qingming Festival painting