Gastric cancer T1N0M0 does not need chemotherapy. T1N0M0 refers to early gastric cancer, which means the tumor invades the mucosal layer, and there is no lymph node metastasis or distant metastasis, so only surgery is needed. Surgery is required to remove the tumor and clean the lymph nodes in the area around the tumor. After surgery, chemotherapy is not required and regular follow-up is sufficient. For early-stage gastric cancer, regular follow-up is also needed after surgery because theoretically there is a possibility of tumor recurrence or tumor metastasis, so gastroscopy should be done every year and relevant indexes, such as tumor index and abdominal enhancement CT, should be reviewed regularly.