This single-arm, multicenter Phase 2 trial will treat the patients who have relapsed or refractory stomach cancer with an infusion of the patient's own T cells that have been genetically modified to express a chimeric antigen receptor(CAR) that will bind to tumor cells that express the EPCAM protein on the cell surface.The study will determine if these modified T cells help the body's immune system eliminate tumor cells.The trial will also study the safety of treatment with CAR-T, how long CAR-T cells stay in the patient's body and the impact of this treatment on survival.

This is a single-arm, multicenter Phase 2 study to evaluate the efficacy and safety of the CAR-T for Stomach Cancer. The study will be conducted using a phaseⅠ /Ⅱ design.The study will have the following sequential phases: Part A(screening leukapheresis, cell product preparation, and cytoreductive chemotherapy) and Part B(treatment and follow-up). The follow-up period for each participant is approximately 35 months after the final CAR-T infusion.The total duration of the study is expected to be approximately 3 years. A total of 19 patients may be enrolled over a period of 3 years.

Inclusion Criteria:

1. According to UICC or gastric cancer diagnosis and treatment guideline of diagnosis for patients with gastric cancer, first-line and second-line chemotherapy of advanced gastric cancer, and through flow cytometry or immune tissues (cell) chemistry, confirm the tumor cells positive expression of relevant molecular targets;
2. Age <=75 years old, both male and female;
3. Is expected to survive more than 3 months;
4. Physical condition is good: 0-2 score ECOG score;
5. The lymphocyte count must > =0.4*10^9/L at the time of collection of peripheral blood;
6. Vital organs (heart, kidney) function is normal, there is no major wound healing. No serious virus, bacterial infection;
7. Non pregnancy and lactation;
8. History of severe allergic reactions without biological products;
9. Voluntary participation, good compliance,the subjects can cooperate with the experimental observation, and signed a written Informed Consent Form;
10. At least one measurable lesion.

Exclusion Criteria:

1. Pregnant or lactating women;
2. Organ failure, such as heart: Class III and IV; liver: to Chlid grading of liver function grade C; kidney: kidney failure and uremia stage; lung: symptoms of severe respiratory failure; brain: disorder of consciousness;
3. Patients with significant graft versus host disease (GVHD) after organ transplant history or allogeneic hematopoietic stem cell transplantation;
4. Long term use of immunosuppressive drugs or people with severe autoimmune diseases;
5. Any other chronic disease patients who have been treated with immune agents or hormone therapy;
6. A serious infectious disease with severe, uncontrollable, wound healing
7. Allergy to the interleukin and interferon cytokine;
8. Coagulation abnormalities and severe thrombosis;
9. Patients who have participated in other clinical trials or other clinical trials in the past 30 days
10. The Investigator believe the patients should not participate in this experiment.

No plans to share data.