Good level. He has made achievements in clinical and scientific research fields such as laparoscopic minimally invasive surgery, anus-preserving surgery for low rectal tumors, rapid rehabilitation of gastrointestinal surgery, individualized treatment of perianal pelvic floor diseases, and genetic screening of digestive tract tumors. Xu Dong, the core member of MDT team of Colorectal Cancer Center of the Second Hospital of Zhejiang University, is the deputy chief physician, chief physician, doctor of medicine, tutor of master's degree and member of doctoral tutor group of the Second Affiliated Hospital of Zhejiang University School of Medicine.