In Asia in the Making of Europe, by Donald Lack, he happened to notice a short passage stating that in the late 16th century the Spanish Jesuit Alonso Sanchez had once advocated a Spanish invasion of China.
研究過程中，歐陽平博士在 Donald Lach 的著作《Asia in the Making of Europe》，無意中讀到一個簡短的資料，即十六世紀末，一個西班牙耶穌會教徒，桑伽思曾有鼓動侵略中國的計畫。