Lin Jingqiu, a senior obstetrician and gynecologist, welcomed a pair of special twin patients at the juncture of her career at the age of fifty, sisters whom she personally delivered more than 20 years ago. They appeared in her clinic with completely opposite demands for surgery: sister Su Wan asked to remove the painful uterus, while sister Su Chen pleaded to use all means to save the fetus in her belly. What is even more shocking is that the names of the same man are filled in the spouse registration column of the two sisters.