As Wang Changzhi (1899-1960), a Jesuit priest from Shanghai’s Catholic mission in Xujiahui, was preparing to leave France to return to China in December 1936, he entrusted the promotion of his newly published book, La philosophie morale de Wang Yangming (Geuthner, 1936) to Gaston Fessard (1897-1978), a longtime friend from the Jesuit Theologate in Lyon-Fourvière, then associate editor of the Jesuit journal Recherches de sciences religieuses and author of Pax Nostra (1936). From that time until Wang’s death on December 28, 1960, Wang Changzhi and Gaston Fessard maintained their brotherly connection as Wang lived through war and exile a continent away. Their correspondence, partly lost or misplaced, nevertheless sheds light on the ways Chinese Catholic theologians interacted with their counterparts in Europe. This paper complements and enriches previous research on Wang Changzhi (Translingual Catholics, 2025) and analyzes the letters that Wang wrote to Fessard which have recently become accessible.