Depending on the patient’s health condition, some necessary preoperative tests and examinations will be performed, such as blood routine, blood type, liver and kidney function, coagulation function, electrolytes, electrocardiogram, chest X-ray, liver and biliary ultrasound, etc. The patient should not eat or drink for 8 hours before the operation. If the patient is constipated, he should be given a general enema or oral cathartic drugs. If the patient is taking aspirin, blood viscosity lowering or arthritis treatment drugs, the above drugs must be stopped at the appropriate time before surgery under the guidance of the doctor. Hou Dongsheng, Department of Minimally Invasive General Surgery, The First Hospital of Guangzhou Medical University