He remained in China for many years, and during that time conducted historical and scientific studies.
The Catholic Encyclopedia describes his style as "somewhat diffuse", but praises the variety of information contained in his writings.
Cibot's most lengthy work, his Essai sur l'antiquité des Chinois, appeared in the first volume of the Mémoires.
This view was not held, however, by other contemporary writers: in the second volume of the Mémoires his colleague, Jean Joseph Marie Amiot, in his L'antiquité des Chinois prouvée par les monuments, defended the traditional Chinese chronology.
Cibot also instituted a comparison between the Jews and the Chinese in connection with a commentary on the Book of Esther (Mémoires, vols.