Specialty: One-centimeter incision of biliary pancreatic surgery (more than 300 cases completed in a year), that is, single-incision laparoscopic treatment of gallstones, gallbladder polyps, gallbladder tumors, pancreatic cysts, pancreatic tumors, liver cysts, liver tumors.

Introduction: Dr. GENG Yajun is a multi-practitioner of Jiahui Health, and is now the deputy chief physician of Biliopancreatic Surgery Department and the leader of the Single-incision Minimally Invasive Surgery Group in Renji Hospital Affiliated to Shanghai Jiao Tong University. Dr. GENG Yajun is a postdoc in Clinical Medicine of Shanghai Jiao Tong University with the supervision of Professors Liu Yingbin, Wang Guangyi and Lv Guoyue, who are famous experts in hepatobiliary surgery in China. Focused on gallbladder disease research for more than15 years, Dr. Gen has published 4 SCI articles as the first author, with the highest impact factor score of 20.577 and presided 1 National Natural Science Foundation project. He was a visiting scholar at the University of Illinois in 2011 and participated in the compilation of Chinese expert consensus on single-incision laparoscopic cholecystectomy （2024 edition）.