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Mathematics invented by China in ancient times.
Zu Chongzhi in the Southern Dynasties calculated π-3.1415926 ÷ π ÷ 3.1415927 more accurately by using Liu Wei's graphic cutting technology.

Liu Wei's Mathematical Cutting Graph From 225 to 295, Liu Wei-Liu Wei in Wei and Jin Dynasties invented the method of cutting graph, and his value was 3. 14. He also invented a new division for linear equations. The problem of indefinite equation is put forward, and the summation formula of arithmetic progression's first several terms is established. Liu is as famous as Euclid and Archimedes. Zhu Shijie, the "Four Jade Juanjian" in Zhu Shijie Mathematics, was a mathematician in Yuan Dynasty in China. 1299 was compiled into China's first book "Arithmetic Enlightenment", which formed a relatively complete system from the four operations to the heavenly arts. 1303, he wrote "Four Elements Jade Mirror", which expanded Tiandao to "Four Elements Technique", which is a solution of high-order equations (up to four unknowns). Europe did not put forward the same solution-elimination method until 1775. Sutton, an American historian of science, rated his Four Elements Jade Mirror as one of the most outstanding mathematical works in the world.

Qin Mathematics 1202~ 1247 initiated Grandpa to solve congruences once a day, Qin-1202 ~ 1247 China mathematician. There are nine chapters in the book. Li Zhi Li Zhi, a mathematician in China, wrote The Sea Mirror of Landscape Mapping, which is the first masterpiece in China to systematically revise Tianyuan Art.

During the period of Sun Tzu's Three Kingdoms, Sun Tzu counted the classics for three hundred years. The origin of the multiplication theorem was called "Things Don't Know Counts", and he wrote a book "Sun Tzu's Counting Classics", which systematically discussed the system of counting classics.