1, Zu Chongzhi: Zu Chongzhi (429 ~500) was an outstanding mathematician and astronomer in the Southern and Northern Dynasties. On the basis of exploring the accurate method of pi pioneered by Liu Hui, he first calculated the "pi" to the seventh place after the decimal point, that is, between 3. 14 15926 and 3. 14 15927. His "ancestral rate" has made great contributions to mathematical research.

2. Liu Hui: Liu Hui (about 225-295) was a great mathematician in Wei and Jin Dynasties and one of the founders of China's classical mathematical theory. His representative works "Nine Arithmetic Notes" and "Arithmetic on the Island" are the most precious mathematical heritages of China.

3. Zhu Shijie: Zhu Shijie (1249- 13 14), a mathematician and educator in the Yuan Dynasty, was known as "the greatest mathematician in the Middle Ages".