Elie Dolgin in Nature:The video opens with a man in his 80s slumped in a hospital bed, his face hollow as he scrunches his eyes. A jump cut advances the scene three days: the man is alert now, words gathering as he identifies his son. At eight months, the man walks briskly down a hospital corridor. The treatment was first reported1 in 2022 in a Chinese-language journal by microsurgeon Qingping Xie, president of the Qiushi Hospital in Hangzhou, China. “It basically started a frenzy of this surgery being performed left and right.”