Jesuits in the 12th or 13th century? No way! Saint Ignatius, the founder of the Jesuits, lived in the 15th century. I said two centuries after Zheng He's supposed voyages, that is, in the 16th century, at the time of Matteo Ricci. But in the 12th and 13th there were Franciscan missionaries and emissaries to China, such as Giovanni da Pian del Carpine.