Traditional laparoscopic radical gastric cancer surgery mostly refers to laparoscopic-assisted radical gastric cancer surgery, i.e., laparoscopic completion of free omentum, lymphatic clearance, and vascular dissection followed by auxiliary small upper abdominal incision to complete resection and anastomosis, which is a clearer intra-abdominal operation and smaller surgical incision compared with open radical gastric cancer surgery to achieve a certain degree of minimally invasive effect, but due to the auxiliary small incision of 8-10 cm in the upper abdomen, especially for some In obese patients with thick abdominal wall and large anterior and posterior abdominal diameters, this auxiliary incision is often larger, and it is often questioned whether it is truly minimally invasive surgery. In particular, the laparoscopic gastroduodenal triangle anastomosis technique, which was first accomplished by Japanese scholars in 2004, is a more minimally invasive procedure based on laparoscopic-assisted radical surgery for gastric cancer, in which all operational steps are completed in the abdominal cavity, i.e., freeing, cutting, reconstructing the digestive tract and then enlarging the umbilical poke to a tiny incision of about 3 cm to remove the specimen. It also avoids the tumor implantation and contamination of the incision that may be caused by opening the auxiliary incision to present the stomach for operation outside the body, and the continuity of the reconstructed gastroduodenum is more in line with the physiological structure, avoiding many post-gastrectomy anastomotic complications. Once this technology was introduced, it immediately took the world by storm, but many gastrointestinal surgeons were daunted by its higher technical requirements for the operator. In the past week, Wang Quan, deputy director of the Department of Gastrocolorectal Surgery of the First Hospital of Jilin University, has performed completely laparoscopic radical gastric cancer surgery with gastroduodenal triangle anastomosis for several gastric cancer patients in a row.