The main clinical symptoms of advanced gastric adenocarcinoma before death are: 1. Extreme emaciation, severe malnutrition, severe anemia, and multi-system organ dysfunction, which is called “cachexia” in medical science. 2. Pain in the stomach, which can be persistent and aggravated, and the mechanism of causing such cancer pain is multifaceted, and can be accompanied by nausea, vomiting, acid reflux, heartburn, etc. 3. 3. Upper gastrointestinal obstruction or gastric pyloric obstruction, resulting in difficulty or inability to eat. 4. Hemorrhage in upper gastrointestinal tract, manifested as vomiting coffee-colored or bright red blood, or accompanied by tarry stools or blood in stool. 5. Symptoms corresponding to metastases of gastric cancer, such as massive ascites and peritonitis caused by metastasis of gastric cancer cells to the abdominal cavity, bone pain and paralysis of corresponding parts caused by metastasis to bone tissue, and metastasis to the abdominal cavity. The metastasis to the liver causes liver failure, and the metastasis to the chest or lung causes respiratory difficulty.