As the last Jesuit missionary in Beijing, Poirot created a carefully selected corpus of Biblical texts for an elite Manchu readership — Catholic converts educated in Confucian values — enabling this community to maintain their faith in the anticipated absence of Catholic clergy. This was a revolutionary endeavour: Poirot acted against explicit prohibitions from both the Catholic Church, which opposed unauthorized translations, and the Qing state, which forbade Christian instruction of Manchu subjects.

Poirot accommodated his texts to a Confucian-educated audience by emphasizing Biblical genealogies to assert Christianity’s legitimate lineage, employing classical Chinese literary devices, and incorporating catechetical annotations featuring question-and-answer structures and encyclopaedic explanations. His pastoral zeal ultimately outweighed legal prohibition, as he prepared Manchu converts to serve as future catechists for their community.