Many people in modern China highly admire the abacus and think it is one of the greatest inventions of mankind. So we should find the inventor of the abacus to commemorate this great inventor of mankind. But the inventor of the abacus is controversial. Some people say that it was Cheng Dawei, a mathematician of the Ming Dynasty (the last outstanding mathematician in the East), but Wang Wensu, the greatest mathematician of the Ming Dynasty who was more than 100 years earlier than him, had a complete abacus theory in his mathematical masterpiece "A Treasure of Algorithms", and historical data clearly proved that abacus was widely used in the Song Dynasty. So Cheng Dawei can't be the inventor of the abacus. Some people think that Xu Yue was a great mathematician in Wei, Jin, Southern and Northern Dynasties, but in fact Xu Yue only recorded in his works that Liu Hong, a mathematician in the Eastern Han Dynasty, used abacus. So some people think that Liu Hong is the inventor of abacus. However, historical data prove that until the Tang Dynasty, the chips of the abacus were just changed into beads, which were not fixed and were essentially the same as those of the abacus. Therefore, at most, Liu Hong replaced the longest-used chip in history with beads, which is not a real invention.

In fact, raising money is the predecessor of abacus. The algorithm and theory of abacus are all about ascending algorithm and ascending disk. There is no substantial algorithm and theoretical progress in abacus calculation except using beads and fixing. The real greatness of China people is not abacus, but calculation and preparation! The invention of financing can overthrow the Yao-Shun era. Some people think that Dashun invented financing. But this is a speculation. Only the Yao and Shun era has been planned and prepared, which is already a great achievement of mankind too early!

However, there is an earlier algorithm than planning financing ~ strategy algorithm! Strategy calculation is to use bamboo sticks or sticks as calculation tools, which is called "strategy". One strategy is the unit of number "one" (initially expressed by fingers). When it is greater than the total number of fingers, that is, "ten", the strategy with a certain distance in front of the ten strategies represents ten. This is the invention of the decimal system! Archaeological data show that the earliest strategy came into being eight or nine thousand years ago, and Fuxi had written river maps and Luo Shu to express mathematical theory seven or eight thousand years ago, which was also the separation of yin and yang (parity). Later, Luo Shu evolved into a mathematical Rubik's cube, which is a determinant. Therefore, abacus was not invented in the era of Dashun or Yaoshun. Of course, because of convenience, the original strategy may also be stone algorithm or mud algorithm or even bone signing algorithm. Only by replacing fingers with wooden (bamboo) markers can we invent the decimal algorithm. And there are only ten fingers, so you can't invent the decimal system.

China ancestors gradually improved in the process of planning. First, they put the planning in a rectangle to avoid confusion, and then divided the rectangle into two parts. The upper planning is one for five, that is, the best planning uses one plan to represent the number five, and the following planning still uses one plan to represent one. This invention may be the bureaucratic leader who managed slaves (initially prisoners) in the era of the Yellow Emperor. If the number exceeds 10, the number will advance according to the best strategy, and if it reaches 50, it will advance according to the best strategy. When a large number of vacancies are encountered (such as the "zero" position of 10 1 4007,70130), the position is reset to the original position and written as a circle or box, so the Chinese ancestors invented the number "zero". At this point, the ancestors of the Chinese nation invented the decimal algorithm system containing "zero". In the field of mathematics in Gu Hua, by imitating the "strategy" of expressing numbers, a set of digital writing methods was specially invented, which is the Gu Hua number symbol. It is different from the commonly used numbers in language and writing. Chinese numbers originated from strategic numbers but gradually developed into complexity or variation, so Gu Hua has two sets of expressions: literal numbers and counting numbers. However, only scholars who design numbers use mathematical numbers, so the popularity rate is not high. Because the calculation of large numbers is carried out in the strategy of upper and lower rectangles, this calculation is called "preparation", and the concepts of preparation and preparation come into being. Later, a rectangular plan was called a plan, a plan, and a plan was also called a plan. There is a set of formulas calculated according to mathematical logic (the theoretical principle of addition, subtraction, multiplication and division), which is also a calculation formula. Later, for convenience, the strategy or compilation was changed to round beads (about the latest Qin and Han Dynasties and the Warring States Period), and the abacus was compiled into a pearl abacus, but the calculation formula remained unchanged. Later, the beads were drilled and fixed with iron bars (at the latest in the early Song Dynasty), and the abacus became an abacus, but the formula was still the same.

So the really great invention is not an abacus, but a plan or calculation, which can also be collectively called a planning algorithm. The strategic algorithm invented by Shenhua's ancestors led to the birth of decimal and digital zero. This is the real greatness.

So who invented the strategy algorithm? There's no way to know. The decimal system of historical reprinted documents is attributed to Fuxi, and the theoretical system of number theory calculation is attributed to Li Shou (the first mathematical monograph "99 Books"). Perhaps Fuxi completed the strategic algorithm and finally invented the decimal system, while Li Shou finally invented the chip, invented zero and perfected the algorithm theory.