Guo Shoujing
Kublai Khan built a number of large observatories in China and his libraries included the "Wu-hu-lie-ti" (Euclid) brought by Muslim mathematicians. Zhu Shijie and Guo Shoujing were notable mathematicians in Mongol-ruled China. The Mongol physician Hu Sihui described the importance of a healthy diet in a 1330 medical treatise.