One day, Liu Hui took shelter from the rain under the loess cliff of Bafangsong and found a soil crack under the cliff. He pushed with extremely young people and found it spacious. Liu Hui, a strange man, cleaned up and simply lived in it instead of going home. In summer, he studies gossip between two trees, and measures the overlapping position of two trees at noon, regardless of eating.

An excellent boy should be given a spoon after dinner and put it in the heart of the yin-yang fish in the gossip tray. The handle of the spoon points to the hole, which is the direction of Polaris. This is the direction in which the two trees he studied overlap. He moved again as usual, so he gently turned to the divination plate, and the spoon automatically turned to the hole to overlap. He also ignored visitors and played with his own spoon.

He closed his eyes, went in and out of the hole, turned left and turned right to dance, obsessed with words. Tourists and passers-by pointed and laughed, thinking that he was possessed and danced. This is the legend of Liu Hui's playing with a spoon, but it is such a spoon that has played with a compass and a compass, which has made the world's navigation career leap into the era of leading technology.

Because the spoon on the divination plate always points in the direction of the North Star, people call his rain shelter the Arctic Cave. Maybe the magnetic field here is particularly strong. It seems that the ancient compass and compass all refer to the north needle. It is also like a spoon on a plate, always pointing north.

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Liu Hui's achievements in mathematics;

Liu Hui was the greatest mathematician in Wei and Jin Dynasties. He made great contributions to the establishment and development of China's classical mathematical theory, and occupied an important position in the history of mathematics in China and even at that time. Next, let's take a look at the profile of Liu Hui.

Liu Hui was born around 225 AD and died in 295. He was the most outstanding mathematician in the world at that time. His works in this field have a vital influence on the development of mathematics in later generations, and also laid his unshakable position in the field of mathematics, leaving the most precious cultural heritage for the field of mathematics.

Liu Hui is a well-deserved master in mathematics. He transformed traditional mathematics with all kinds of excellent ideas, which made mathematics research step up to a new level. His mathematical works are precious to the mathematical community, and island computing is one of them.

In 263, Liu Hui wrote Notes on Nine Chapters of Arithmetic, of which Island Arithmetic was the tenth volume. It was not until the Tang Dynasty that the Book of Islands Calculations began to appear as a work alone. This book is China's earliest surveying work, which deals with the problem of measuring height and distance.

Baidu Encyclopedia-Liu Hui