Depending on the specific conditions of the disease, more than half of the stomach, or even 75 percent of the stomach, needs to be removed for cardia cancer surgery, and the residual stomach becomes smaller than the original one. After surgery, patients will definitely eat less than normal. This is easy to understand. In this regard, we should firstly explain the reasons and justifications to the patients and their families in detail to relieve the patients’ heart burden, which is the main very. Secondly, we can let the patient eat less and more, chew slowly. As time goes by and the condition recovers, the amount of food will gradually increase, and some patients will return to their pre-operative meal size, which is not a big problem and need not be worried. For medication, you can give gastric power medicine, or herbal medicine that helps eliminate food to help digestion.