What is the source of human happiness? Many people once asked me what my original intention was when I chose the profession of doctor, but in fact, there was no goal when I first chose to study medicine, just some curiosity. After working, whenever I successfully completed an operation and sent a patient to the hospital, I felt a sense of accomplishment and a joy that is hard to understand for other professionals. When the challenges and risks in front of me, I remembered the reason why I gave up the department where I stayed in school and low risk, and resolutely went to the surgery department which often faced the test of life and death, and exorcised the disease for the patients with my own hands. Nowadays, it is the age of information technology, and for surgeons, it is the age of minimally invasive. Keeping up with the development of the times, new and minimally invasive techniques appear from time to time, and we have to keep progressing and pioneering in order to do better as doctors in the new era. Today, when we see the patients smiling and grateful to our team for the minimally invasive surgery we spent nearly 8 hours on last week, we feel that the initial effort was worth it. Faced with difficulties: recurrent inflammation, history of biliary surgery, advanced age, many stones, complicated surgery, etc., we did not back down. With detailed and thorough preparation, patient and attentive communication, and careful and precise surgical skills, we completed the surgery on a 76-year-old patient with intrahepatic bile duct stones, common bile duct cysts and stones, and post-biliary surgery with minimally invasive surgery: laparoscopic adhesion release, liver resection, common bile duct cyst removal and stone extraction, and bile-intestinal R-Y internal drainage. Although, we had a tough surgery, the ancient patient underwent a previously unimaginable surgery at the cost of minimal trauma, perfectly. This is the honor and pride of surgeons, and this is the joy that nothing can buy, tired and happy!