"We need an explanation. We need justice," said Qu Binbin, a 29-year-old man in a wheelchair who said he was able to get around without crutches before having the surgery three years ago.

患者璩彬彬说：“我们需要解释，我们要求正义。”坐在轮椅上的29岁的他说，3年前未做手术时他还能依靠拐杖来回走动。