Chemotherapy is also useful after the spread of gastric cancer, because chemotherapy is injected into the vein through chemical drugs to kill cancer cells in the blood circulation, so it is a very effective treatment after the spread of gastric cancer through blood circulation. The purpose of chemotherapy is to kill metastatic cancer cells and the primary tumor. Chemotherapy drugs such as docetaxel, cisplatin or oxaliplatin, 5-fluorouracil, which are commonly used in gastric cancer, mainly target metastatic gastric cancer or the spread of gastric cancer. The local control rate can reach more than 20%-30% after chemotherapy, and the progression-free survival time is about 8-10 months.