Zhu Shijie (Chinese: 朱世杰; pinyin: Zhū Shìjié; Wade–Giles: Chu Shih-chieh, fl thirteenth century, 1270 - 1330), courtesy name Hanqing (汉卿), pseudonym Songting (松庭), was one of the greatest Chinese mathematicians living during the Yuan Dynasty.
Zhu was born close to today's Beijing. Two of his mathematical works have survived. Introduction to Computational Studies (算学启蒙Suanxue qimeng), and Jade Mirror of the Four Unknowns.
Read more about Zhu Shijie: Suanxue Qimeng, Jade Mirror of The Four Unknowns