Ancient computing tools in China?

Cheng, a bank cadre in Hanzhong City, Shaanxi Province, recently restored all the 13 computing tools lost for more than a thousand years in ancient China according to Li's imagination.

According to the book "Notes on Numerology" written by Zhen Luan, the chief of Hanzhong in the Northern Zhou Dynasty, there were 14 algorithms in China at that time, namely, integration (i.e. compilation), Taiyi, Eryi, Sancai, Wuxing, Bagua, Jiugong, Yunhua, knowing and doing, number calculation, head calculation, turtle calculation and so on. Among them, except 14 (counting), all other 13 algorithms have calculators, and the name "abacus calculation" is first seen here. However, there are no pictures in this book. After the Tang and Song Dynasties, 13 computing tools were all lost. In this regard, Chinese and foreign scholars have put forward their own "conjectures", and "Li Conjecture Map" is one of the most important achievements made by Chinese scholars in studying this subject.

1992, under the guidance of Professor Li, the vice president of China Abacus History Research Association, Cheng took the lead in deciphering Taiyi Calculus, which made preschool children master the addition and subtraction within 10,000 in only 10 class, causing a sensation at home and abroad. In 200 1 year, he invented the "world abacus", which not only replaced the Russian, Japanese and China 10, 5 and 7 abacus one by one, but also reproduced the "Taiyi Calculus, Two Calculations, Three Calculations and Abacus Calculations" one by one. Later, it was repeatedly developed according to Li Imagination Map, which lasted for more than 1 year, and finally all the lost ancient 13 computing tools were restored.

Experts believe that the reappearance of "Thirteen Kinds of Ancient Calculations" is a new achievement in the study of ancient calculations in China, especially the rare "displacement algorithm" of "Jiugong Calculations" was discovered for the first time in the world. In the past, the familiar calculation methods were all based on the fixed position system, while the "Jiugong calculation" was based on the fixed position. Reference:/news/science/20020531170.html.