Shi Li: doctor, deputy director and deputy director of master's supervisor of Obstetrics, the fourth hospital of Hebei Medical University. In 2014, he went to the "three hospitals of Beijing Medical University" for further study. Good at standardized diagnosis and treatment of recurrent abortion and high-risk pregnancy, good at endoscopic treatment of all kinds of ectopic pregnancy. He has undertaken two provincial level projects and won the first prize of science and technology progress of Provincial Department of health. Published 7 articles in the core journal of beitu. Currently, he is the standing member of reproductive health professional committee of Hebei Preventive Medicine Association, vice chairman of Hebei Emergency Medicine Association, and member of women's health professional committee of Hebei Preventive Medicine Association.