On the early morning of the 22nd, 74-year-old elderly woman Zhang Siling from Pudong New Area was admitted to the hospital due to a sudden acute illness. On the afternoon of the 23rd, the same day the hospital suspended operations and went into lockdown, she tragically passed away. Her family suspects that Zhang Siling's death was caused by a misdiagnosis at Shanghai Punan Hospital, followed by a five-hour period without any doctors due to the hospital lockdown, ultimately missing the best window for treatment.