Xu Guangqi

Xu Guangqi (1562–1633), who later adopted the name Paul Siu, was a Chinese scholar-bureaucrat, agricultural scientist, astronomer, and mathematician in the Ming Dynasty. Xu was a colleague and collaborator of the Italian Jesuits Matteo Ricci and Sabatino de Ursis and they translated several classic Western texts into Chinese, including part of Euclid's Elements. He was also the author of the Nong Zheng Quan Shu, one of the first comprehensive treatises on the subject of agriculture. He was one of the "Three Pillars of Chinese Catholicism". His current title is Servant of God.