Zu Chongzhi is an outstanding mathematician and scientist in China. People in the Southern and Northern Dynasties, Han people, the word Wen Yuan. Born in Yuanjia for six years and died in Hou Yongyuan for two years. My ancestral home is in Qixian County, Fanyang County. My grandfather is in charge of civil engineering, and my father is knowledgeable. Zu Chongzhi received scientific knowledge from his family since childhood. When I was young, I entered Hualin University and engaged in academic activities. Throughout his life, he served as an official in South Xuzhou, such as Shangshu, Yamen joining the army, Lou county magistrate, servant shooting and Changshui captain. Its main contributions are in mathematics, astronomical calendar and machinery. In mathematics, he wrote a book "Composition", which was included in the famous "Ten Arithmetic Books" as an arithmetic textbook for imperial academy in the Tang Dynasty, but it was later lost. There is a brief record about pi in Sui Shu Law Yearbook. The true value calculated by Zu Chongzhi is between 3. 14 15926 and 3. 14 15927, which is equivalent to the seventh place after the decimal point and is the most advanced achievement in the world at that time. This record was not broken by Arabian mathematician Cassie until15th century. Zu Chongzhi also gave two forms of fractions: 22/7 and 355/ 1 13, in which the density was accurate to the seventh place after the decimal point, and it was not rediscovered by the western Dutch mathematician Otto until16th century. Together with his son Zu _, Zu Chongzhi successfully solved the problem of calculating the volume of a sphere by using the Mohe square cover, and obtained the correct formula of the volume of a sphere. On the astronomical calendar, Zu Chongzhi created the Daming calendar, and introduced precession into the calendar at the earliest; New leap weeks of 39 1 year and 144 leap months are adopted. It is the first time to accurately measure the data such as the number of months, days and the number of days in the tropical year, and invented the method of measuring the length of the sun shadow from winter to noon in the days before and after, and determined the time from winter to the sun. In mechanics, he has designed and manufactured a water hammer mill, a compass driven by copper parts, a thousand-mile ship, a timer and so on. In addition, he is also quite accomplished in melody, literature and textual research. Proficient in temperament, good at playing chess and writing novels about different things. He is one of the few people who read widely in history.

To commemorate this great ancient scientist, people named a crater on the back of the moon as Zu Chongzhi crater, and the asteroid 1888 as Zu Chongzhi asteroid.

Zu Chongzhi worked hard to calculate the value of pi to seven decimal places for the first time in the history of mathematics in the world, that is, between 3. 14 15926 and 3. 14 15927. He proposed an agreed rate of 22/7 and a secret rate of 355/ 1 13. This secret rate was first put forward in the world, more than 1000 years earlier than that in Europe, so some people advocate calling it ancestor rate. He compiled his mathematics research results into a book called Seal Characters, which was once regarded as a mathematics textbook by Chinese studies in the Tang Dynasty. His Ming Li introduced precession into the calendar for the first time. It is planned to set 39 1 year 144 Yan Yue. The length of a tropical year is 365.338+04438+0 days, and the error is only about 50 seconds. He is not only an outstanding mathematician and astronomer, but also an outstanding mechanic expert. Rebuild all kinds of exquisite machinery, such as South Guide Car and Thousand-mile Ship, which have long been lost. Besides, he also studies music. Interpretation of the Analects of Confucius, Interpretation of Filial Piety, Yili, Lao, Zhuang and Novel Stories have long been lost.