Yang Hui
Qin Jiushao (c. 1202–1261) was the first to introduce the zero symbol into Chinese mathematics. Before this innovation, blank spaces were used instead of zeros in the system of counting rods. Pascal's triangle was first illustrated in China by Yang Hui in his book "Xiangjie Jiuzhang Suanfa" (详解九章算法), although it was described earlier around 1100 by Jia Xian. Although the "Introduction to Computational Studies" (算学启蒙) written by Zhu Shijie (fl. 13th century) in 1299 contained nothing new in Chinese algebra, it had a great impact on the development of Japanese mathematics.