Zhou Pi 'ai ·suan Jing is the earliest existing mathematical classic in China. Nine Chapters Arithmetic was written around A.D., which systematically summarized China's mathematical achievements from pre-Qin to mid-Western Han Dynasty. The Southern and Northern Dynasties witnessed the vigorous development of ancient mathematics in China, and many books about mathematics appeared, such as Sun Tzu's Calculations, Xiahou Yang's Calculations and Zhang Qiu's Calculations. Jia Xian put forward the method of "increase, multiply and open" to open any higher power in Nine Chapters of the Yellow Emperor's Arithmetic Fine Grass, but the manuscript of Nine Chapters of the Yellow Emperor's Arithmetic Fine Grass written by Jia Xian has been lost. Qin was an outstanding mathematician in the Southern Song Dynasty. 1247 popularized the "multiplication and division method" in Shu Shu Jiu Zhang, discussed the numerical solutions of higher-order equations, and cited more than 20 solutions of higher-order equations (the highest is the decagonal equation) according to practice. On 1248, Ye Li published "Circle Survey of the Sea Mirror", which is the first book to systematically discuss "Tianshu" (one-dimensional higher-order equation) and has a milestone significance in the history of mathematics. In A.D. 126 1 year, Yang Hui (the year of birth and death is unknown) in the Southern Song Dynasty used "piling technique" to find the sum of several kinds of high-order arithmetic progression. In A.D. 1274, he also described the "Nine-fold Agile Method" in his book The Origin of Multiplication and Division Transformation, and introduced various calculation methods of multiplication and division. A.D. 1303, Zhu Shijie (date of birth and death unknown) wrote Siyuan Jade Mirror in Yuan Dynasty. /kloc-After the establishment of the Ming Dynasty in the middle and late 4th century, the rulers carried out the imperial examination system characterized by eight-part essay, which greatly reduced the mathematics content in the national imperial examination. From then on, the ancient mathematics in China began to show a trend of overall decline. In the Ming Dynasty, abacus began to spread in China. Cheng Dawei 1592's Command Arithmetic Unified Clan is a masterpiece of abacus theory. Xu Guangqi demonstrated the Pythagorean prospecting in China with western logical reasoning methods, so he wrote two books to measure similarities and differences and Pythagorean significance. Deng's Great Survey (Volume 2), Secant Circle and Eight-line Table (Volume 6) and giacomo Rowe's Significance of Measurement (Volume 10) are works introducing western trigonometry. Hua is a famous mathematician at home and abroad. He is the founder and pioneer of China's research on analytic number theory, canonical group, matrix geometry, automorphism, multiple complex functions and so on. . He has published about 200 academic papers, including Heap Prime Theory, Introduction to Advanced Mathematics, Estimation of Exponential Sum and Its Application in Number Theory, Typical Groups, Analysis of Typical Fields in the Theory of Functions of Multiple Complex Variables, Introduction to Number Theory, Numerical Integral and Its Application, Starting from the Unit Circle and Optimization Method.