 He became a member of the Society of Jesus in 1600 and distinguished himself in his knowledge of mathematics and theology.In 1610, he was sent as a missionary to China.While waiting at Macau for a favorable opportunity to enter the country he taught mathematics to local scholars and published his "Observation sur l'éclipse de lune du 8 Novembre 1612, faite a Macao" ("Mémoires de l'Acad.