1, a native of the northern song dynasty, Jia Xian, completed the Nine Chapters of Yellow Emperor's Fine Grass about 1050. The original book was lost, but its main contents were copied by Yang Hui's works (about13rd century), so it was handed down from generation to generation. Yang Hui's Detailed Explanation of Nine Chapters' Algorithms (126 1) has a diagram of "the origin of alchemy", which shows that "Jia Xian used this technique".

2. Qin (1208- 1268) was born in (now Anyue County, Ziyang), an ancient Han nationality, and his ancestral home was Lu County. A famous mathematician in the Southern Song Dynasty, together with Ye Li, Yang Hui and Zhu Shijie, he was called the Four Masters of Mathematics in the Song and Yuan Dynasties.

3. Yang Hui, Qian Guang, Han nationality, Qiantang (now Hangzhou, Zhejiang Province) was an outstanding mathematician in the Southern Song Dynasty. He used to be a local administrative officer in the Southern Song Dynasty, and his footprints were all over Suzhou and Hangzhou. He has made great contributions to summarizing agile algorithms such as folk multiplication, division, "superposition", vertical and horizontal diagrams, and mathematics education.

Refer to the above? Baidu Encyclopedia-Yang Hui

Refer to the above? Baidu encyclopedia-Qin

Refer to the above? Baidu Encyclopedia-Jia Xian