Recently, the Department of Urology at Taikang Xianlin Gulou Hospital, Affiliated to Nanjing University Medical School, successfully performed a urethral memory metal prostate stent implantation for 97-year-old Mr. Sun, a resident of Taikang Zhijia Huiyuan with severe benign prostatic hyperplasia complicated by urinary retention. Right after the surgery, Mr. Sun regained spontaneous urination and no longer needed an indwelling urinary catheter.