Zhu Shijie (*c. *1260-1320) was one of traditional China’s greatest algebraists. He is best known for his *Siyuan yujian *(*Precious Mirror of the Four Elements, *1303), in which he demonstrated a technique for solving a system of higher degree polynomial equations containing four unknowns. However, he was also the author of several other influential mathematics texts. The first such book he wrote was *Xin bian suan xue qi* *meng* (*New Arithmetic Enlightenment,* 1299). Here is a selection of images from a 1660 Korean copy of this text, written in Chinese.

The first page of the text:

A page of numerical calculations:

A discussion of the areas of a circle, a triangle, and an isosceles trapezium:

*The images above were obtained through the cooperation of The Houghton Library, Harvard University, Cambridge, Massachusetts.*

See images from a 19th century Chinese copy of this text in *MAA Convergence*.

Index to Mathematical Treasures