张诚 · 1654 – 1707 · French
Jean-François Gerbillon (4 July 1654 – 27 March 1707), Chinese name Zhang Cheng (张诚), courtesy name Shizhai (实斋), was a French Jesuit missionary.
He was born in 1654 in Verdun, France, and joined the Society of Jesus in 1670. In 1684 he was chosen by King Louis XIV of France to be sent to China as a missionary, and was given the title of "King's Mathematician" and made a member of the French Academy of Sciences.
In 1688 (the 26th year of Kangxi), Gerbillon, Jean de Fontaney, Joachim Bouvet, Claude de Visdelou and Louis Le Comte, five in all, arrived in Beijing. Gerbillon and Bouvet were kept at court by the Kangxi Emperor to teach him Western learning, and they compiled and translated works of Western learning such as Elements of Geometry and Principles of Philosophy. In 1689 (the 28th year of Kangxi), by order of the Kangxi Emperor, he joined the Qing government's delegation together with Tomás Pereira and served as interpreter in the border negotiations with Tsarist Russia that produced the Treaty of Nerchinsk. He died in Beijing in 1707.