Recently, a patient with advanced gastric cancer was successfully treated. The patient, Chen, male, 63 years old, visited the doctor because of obstruction in eating, belching, epigastric fullness and discomfort, and wasting. Gastroscopy and abdominal CT confirmed the diagnosis of gastric cardia cancer, and the family specially invited a famous thoracic surgeon to perform surgical treatment in order to obtain good results. After opening the abdominal cavity, it was found that the tumor in the cardia of stomach was 5×5 cm in size, and the tumor at the junction of the head and tail of pancreas was 8×8 cm in size, which was closely adhered to and fixed by the abdominal aorta, and could not be removed by surgery, so the specialist had to close the abdominal cavity, which has a very image name “switch surgery”. After the operation, the doctor told the family, “The patient’s tumor is very large, and the lymph nodes in the abdominal cavity have metastasized and fused with each other to form a block, so it is estimated that the patient will not live for a long time, so let’s prepare for the afterlife.” The family was very desperate and sad, but there was nothing they could do. Later, the author gave the patient integrated radiotherapy treatment, applying the most advanced international tumor treatment technology, including VMAT radiotherapy technology, image-guided precise radiotherapy technology, simultaneous radiotherapy and chemotherapy technology, toxic side effects treatment and supportive treatment technology. The whole treatment lasted for 1.5 months. Although the patient had just undergone a major surgery, the whole treatment process was smooth and stable, with no obvious treatment side effects. Stomach cancer is a common tumor in China, especially in rural areas. In the past, the treatment method of gastric cancer was often to operate first and then chemotherapy after surgery, and most of the patients died within one to two years due to recurrence of tumor metastasis. For patients who underwent “switch” surgery as mentioned above, there is no good treatment method, and 100% of such patients will die of gastric cancer within a short period of time. The latest clinical studies and NCCN cancer treatment guidelines have shown that the best treatment for gastric cancer is surgery first, followed by simultaneous radiotherapy and chemotherapy, which can increase the 3-year absolute disease-free survival rate of gastric cancer by 17% and the disease-free survival rate by 54%, thus greatly improving the effectiveness of cancer treatment. The treatment of the above patient is precisely the application of the world’s latest research results, thus achieving satisfactory results.