Mark couldn’t receive communion because his [opium] addiction was regarded as gravely sinful and scandalous. He prayed for deliverance from his addiction, but deliverance never came. Nevertheless he remained a believing Catholic. At his trial he was given a chance to renounce his faith, but he refused. It is said that he sang the litany of the Blessed Virgin Mary as he was led to his execution.
More on St Mark Ji Tianxing here.
Fr. Wouters had not been faithful to his promise of chastity and had led a scandalous life that was notorious all over the parish and beyond … When his past failures were thrown in his face by his captors as a disgrace to his calling and a negation of his creed, he looked them in the eye and said, ‘Fornicator I always was, heretic I never was.’
More on St Andrew Wouters here.