The sentences made the young activists Hong Kong’s first political prisoners under Chinese rule and prompted a massive street protest on Aug. 20.

"The real thing is that at this moment China and (the) pope have a very good relation," said Argentine Bishop Marcelo Sanchez Sorondo, chancellor of the pontifical academies of Sciences and of Social Sciences.

Pope Francis has accepted the resignation of Cardinal John Tong Hon as bishop of Hong Kong. Coadjutor Bishop Michael Yeung Ming-cheung, 70, succeeds the cardinal as head of the diocese.

Mr. Liu’s death stoked anger among his supporters because of Beijing’s refusal to allow him to travel abroad to seek treatment. Many also accused the Chinese authorities of withholding information about his illness until it was too late to be treated.

If Mr. Liu’s health situation had been carefully monitored, as suggested by the authorities, it only raises more questions about why his illness had developed into late-stage cancer by the time he was put on medical parole, his friends and rights groups say.

The Vatican expressed "grave concern" on Monday for a Chinese bishop who it says was "forcibly removed" from his office several weeks ago and whose whereabouts are unknown.