The Vatican official who negotiated the landmark agreement between the Holy See and China over bishop nominations says the path of normalizing Catholic life there "is still long" but that a new future is now possible.

Speaking in public for the first time since the accord was signed Sept. 22, Archbishop Claudio Maria Celli revealed details of his nearly four-decade-long effort to heal the rift with China at a high-level book launch Monday.

Celli choked up at times, recalling the suffering he witnessed over years meeting with clandestine bishops, as well as the "profound suffering" of illegitimate bishops forced to accept episcopal consecration without papal consent.

Faithful wave and reach out to Pope Francis upon his arrival at Loreto's cathedral, central Italy, Monday, March 25, 2019. Francis has traveled to a major Italian pilgrimage site dedicated to the Virgin Mary to sign a new document dedicated to today's youth. (AP PhotoSandro Perozzi)

Faithful wave and reach out to Pope Francis upon his arrival at Loreto's cathedral, central Italy, Monday, March 25, 2019. Francis has traveled to a major Italian pilgrimage site dedicated to the Virgin Mary to sign a new document dedicated to today's youth. (AP PhotoSandro Perozzi)

The book launch also featured the Italian premier, days after he signed an agreement with China's president supporting Beijing's "Belt and Road" initiative.